Why brands are looking for evidence everywhere

If brands today are looking so much to integrate evidence into their marketing devices, it is not by fashion effect. This is because consumer behavior has changed profoundly.

For a long time, advertising operated according to a relatively simple logic: exposure, memorization, preference. Today, an additional step has taken place between exposure and decision: verification.

Before buying, consumers are now looking to confirm what advertising promises. They consult:

• customer reviews

• product notes

• comparisons

• feedback

• discussions between users

This reflex is no longer marginal, it becomes structural. It’s all about trust.

According to BrightLocal, 49% of consumers say they trust online reviews as much as personal recommendations. Nielsen, for its part, had already pointed out that recommendations from well-known people are the most credible advertising format, and that consumer opinions published online are also among the most reliable formats.

This evolution can also be seen in research practices. According to Sprout Social, 37% of consumers first turn to social media to search for product reviews and recommendations, and 52% of social media users prefer social research to AI chatbots precisely to access UGC and lived experiences.

In other words, advertising does not disappear, but it often becomes the starting point of a validation process. Advertising triggers interest, evidence triggers trust.

From attention to reinsurance

This transformation is already reflected in trademark arbitrations.

In the food & beverage sector in Europe, the Kolsquare study published at the end of March 2026 shows that advertisers are stepping up their collaborations with creators, that 63% favor long-term partnerships, and that 51% rely on the production of user content (UGC), while a significant part also relies on paid amplification. The signal is clear: brands are no longer just looking for visibility, they are looking for formats that can reassure, give credibility and validate their promises. In 2025, Unilever announced that it wanted to devote up to 50% of its media investments to influence, creators and social ecosystems, illustrating a massive shift towards environments where customer proof and recommendation play a central role. This type of decision shows that the issue is no longer just attention, but the perceived credibility of advertising messages.

This logic goes far beyond Europe and the perimeter alone influences. The global influencer marketing platform market was estimated at $25.44 billion in 2024 and $34.25 billion in 2025, with an expected growth of 23.3% per year until 2030. In Europe, this market is also expected to grow strongly, with a CAGR of more than 22% according to Grand View Research.

These numbers don’t just mean that influence is growing, they show something deeper: brands are shifting some of their advertising efficiency to environments where perceived evidence is already embedded.

This shift towards trust is no longer just a marketing issue, it is becoming an industry issue. The fact that trust was at the heart of the 30th UDECAM Meetings in 2026 illustrates this development. The presence, for the first time in two years, of emerging initiatives such as BuyTryShare at this meeting confirms that the issue of proof and advertising credibility is now taking root in the market’s structuring reflections. A cultural transformation rather than a technological one.

One would think that this evolution is primarily technological. In reality, it is mostly cultural.

Consumers no longer just want to hear what brands are saying about themselves, they want to know what other customers are saying. This shift in authority is fundamental.

Credibility is no longer based solely on:

• the media power

• creative quality

• advertising rehearsal

It is also based on the perception of real, observable and shareable experiences. This is probably why brands are investing so much in:

• the social proof

• UGC

• the testimonies

• customer returns

But this mounting evidence creates a new problem. Because when everything becomes evidence, all evidence is no longer equal.

The emerging problem is that not all evidence is equal

If brands are now looking for more evidence, a paradox is beginning to appear. As evidence becomes ubiquitous, its value tends to diminish.

Like the attention yesterday, the evidence in turn enters a form of inflation. Consumers are now exposed to:

• thousands of reviews

• continuous UGC content

• sponsored testimonies

• recommendations from influencers

• aggregate ratings

But this abundance raises a new question: what evidence is really credible?

Because the presence of a witness is no longer enough to create trust. What matters now is the perception of its authenticity.

The Age of Permanent Doubt

This development is part of a broader context of information mistrust. Consumers now know that:

• some opinions are false

• some testimonials are sponsored

• certain UGC content is encouraged

• most influencers are paid

According to several studies on digital trust, a majority of users now report spontaneously doubting the authenticity of the commercial content they encounter. In other words, evidence no longer automatically creates trust. It must now earn it.

From visible evidence to credible evidence

This is probably the most important change in progress: for a long time, the objective was to make the evidence visible; today, the challenge becomes to make the evidence credible.

This move is major because it changes the strategic question that was previously, how to show evidence? but now is: how to show that this evidence is reliable?

It is no longer just a marketing issue. It’s a trusted infrastructure topic.

The risk of a new saturation

This inflation of evidence creates a risk similar to that which advertising has experienced with attention. When everything becomes proof: nothing really differentiates one proof from another.

An authentic opinion can be found alongside:

• an incited opinion

• a sponsored review

• an unverified review

• a manipulated opinion

For the consumer, the border becomes blurred and when the border becomes blurred, confidence decreases.

This is where perhaps the next stage of advertising is taking shape: the transition from an economy of proof to an economy of certified proof.

The next frontier: demonstrable credibility

If attention was the battle of the 2000s, and performance was the battle of the 2010s, the current decade may well become one of credibility.

Because in a saturated environment

• visibility is no longer enough

• proof is no longer enough

• even declared authenticity is no longer enough

What becomes differentiating is the ability to demonstrate that the evidence itself is reliable. And it probably opens up a new category in the advertising ecosystem: that of devices capable of providing not only proof, but verifiable proof.

Towards a new layer of advertising: proof as infrastructure

If proof becomes a central issue, then a new question arises: where should it live in the advertising ecosystem?

Today, customer proof is essentially fragmented. It exists:

• on review platforms

• on social networks

• in e-commerce environments

• in CRM policies

• in branded communities

But it rarely remains integrated in a structured way into the media environments themselves. But if credibility becomes a key factor in advertising effectiveness, evidence could gradually become a new layer of advertising, along with:

• creation

• targeting

• dissemination

• the measure

A layer dedicated to credibility.

From advertising creation to trusted architecture

This development could mark a significant shift in the role of the media. For a long time, their main function was to spread messages. Then it became: optimizing performance. It could now also become: ensuring environments of trust.

From this perspective, the question is no longer just: what message to spread? But also: what evidence can accompany this message to strengthen its credibility?

This shift is major because it transforms advertising from a simple exposure lever into a possible reinsurance lever.

Advertising as a trusted infrastructure

This transformation could also restore a strategic role for premium media environments.

In a context where platforms have captured engagement and social evidence, the media could regain some form of competitive advantage on another ground: trust.

Because historically, premium media didn’t just sell audience. They also sold an editorial context, a credibility, a form of implicit validation.

If evidence becomes a structuring element of advertising effectiveness, these environments could become spaces capable of integrating not only attention, but also credibility.

In other words: after attention economics, and performance economics, we may be entering an economy of trust.

From promise to proof

This could mark an even deeper transition. For decades, advertising has operated on the promise: promise of quality, promise of efficiency, promise of difference.

But in a world where information is constantly circulating, the promise alone is gradually losing its strength. What becomes differentiating is no longer just what the brand says.

This is what the customer experience demonstrates. Advertising could thus evolve from a model centered on promise to one where evidence becomes a natural component of media efficiency.

The next competitive advantage could be credibility

If attention is still needed and performance remains essential, credibility may well become the next competitive advantage for brands.

Not as a supplement. But as a structuring element of advertising efficiency.

Because in an environment saturated with messages, content and declarative evidence, what could make the difference is no longer just the ability to be seen but the ability to be believed.

And that may be where the next transformation of advertising is taking shape: from advertising designed to capture attention to advertising that can earn trust.

The surge in fake reviews is undermining the value of social proof

For a long time, consumer reviews have been one of the most powerful indicators of trust in the digital economy. They have helped reduce the information asymmetry between brands and consumers and introduced a form of collective validation into the purchasing decision. But this mechanism relies on one essential condition: credibility.

However, this credibility is now being undermined by the proliferation of fake reviews, poorly labeled sponsored content, and, more recently, content generated by artificial intelligence.

According to a Fakespot analysis of e-commerce reviews, a significant proportion of the reviews posted on certain major marketplaces show signs of being inauthentic. Meanwhile, in 2024, the U.S. Federal Trade Commission (FTC) tightened its rules against fake reviews and misleading testimonials, with fines of up to tens of thousands of dollars per violation.

In the United Kingdom, the Competition and Markets Authority (CMA) is taking a similar approach by requiring platforms to take greater responsibility for detecting and removing fraudulent reviews.

These regulatory changes reflect a growing realization: social proof has become too significant to remain unregulated. But the risk runs deeper.

When consumers begin to doubt reviews, it’s not just the credibility of the reviews that is affected. The entire trust mechanism becomes fragile.

Because if everything can be manipulated, then nothing really counts as proof anymore. And when social proof loses its credibility, it gradually ceases to be a competitive advantage and becomes mere background noise.

In this context, the issue is no longer simply about collecting reviews. The question becomes: how can we restore their credibility? In an environment saturated with unsubstantiated claims, the next key differentiator could come from verifiable evidence.

Influencer fatigue: when authenticity becomes a formula

In response to growing skepticism toward traditional advertising, brands have invested heavily in influencer marketing over the past decade.

The idea was simple: to replace the brands’ messaging with the voices of individuals.

• Designers who are seen as more relatable to consumers.

• Recommendations that come across as more authentic.

• A more conversational approach to communication.

Over the past decade, this approach has indeed helped restore a degree of credibility. But as the marketing industry becomes increasingly industrialized, a new phenomenon is beginning to emerge: a form of saturation.

Audiences are now exposed to a growing volume of sponsored content, which is often highly formulaic and sometimes difficult to distinguish from one another.

According to several industry studies (including the Edelman Trust Barometer et GWI – GlobalWebIndex), consumers continue to value recommendations from people they perceive as authentic, but are becoming increasingly sensitive to the transparency of commercial partnerships.

It is not influence itself that is the problem. It is its normalization.

When authenticity becomes a marketing tool, it can gradually lose what made it valuable in the first place: its spontaneity. And when every recommendation can be sponsored, consumers naturally develop new critical instincts.

They no longer ask themselves just, “Is this interesting?” but also, “Is this sincere?”

This shift does not signal the end of influencer marketing. Rather, it marks its entry into a phase of maturity—a phase in which credibility can no longer rest solely on perceived proximity, but must be grounded in more solid indicators of trust.

Because in an environment where everything can become a source of influence, true differentiation may come from what remains genuinely credible. When authenticity becomes a formula, trust is no longer a given. It must be earned.

Attention Inflation: When Abundance Diminishes Impact

One of the advertising industry’s greatest achievements over the past two decades has been solving the problem of distribution. Thanks to digital technology, brands can now reach massive, precisely targeted audiences at optimized costs. It has never been easier to get a message out.

But this abundance has created a side effect that is rarely mentioned: information overload.

Every day, consumers are exposed to thousands of marketing messages:

• display formats

• social videos

• influencer placements

• notifications

• retargeting

• CTV

• retail media

• etc.

Advertising is no longer a rarity. It is everywhere. Yet in any economy, abundance tends to reduce perceived value.

This phenomenon is nothing new. Herbert Simon, a Nobel laureate in economics, had already explained that in an information economy, scarcity no longer pertains to information itself but to the available human attention.

Today, this insight has taken on a concrete reality: it is no longer exposure that is lacking. It is genuine attention.

According to several studies on advertising attention (including those by Lumen Research and Karen Nelson-Field / Amplified Intelligence), a significant proportion of digital ad impressions capture only a fraction of a second of actual attention.

In other words: an impression does not guarantee perception. And perception does not guarantee retention.

In this context, simply increasing the number of impressions is no longer enough to boost impact. It can even have the opposite effect: the message becomes trivialized. Because when everything grabs attention, nothing holds it for long.

This overload of information raises a fundamental strategic question for brands: how can they create value in a saturated environment?

The answer may no longer lie solely in the ability to reach audiences, but rather in the ability to be perceived as credible at the moment of exposure. For in an environment where attention is fragmented, trust could become one of the few drivers of impact.

In a saturated attention economy, visibility becomes a commodity. Credibility becomes a competitive advantage.

The obsession with performance: a strategic blind spot?

One of the major advances in modern advertising has been the introduction of a culture of measurement.

• Attribution.

• ROAS.

• CPA.

• Conversion.

• Continuous optimisation.

Marketing has become more scientific, more data-driven, and more accountable. And this shift has yielded significant benefits.

But as is often the case with structural changes, this progress may also have created an imbalance. By focusing heavily on short-term, measurable performance, the advertising industry may gradually be underinvesting in what builds long-term effectiveness: trust.

Several academic and industry studies (notably those by Les Binet and Peter Field – IPA) have shown that strategies focused exclusively on short-term activation can undermine long-term brand-building efforts.

Performance delivers immediate results. Trust builds loyalty. And loyalty drives sustainable growth.

However, what is measurable is not always what matters most. Trust, perceived credibility, or a brand’s legitimacy are harder to quantify than clicks or conversions. But that doesn’t make them any less essential. On the contrary.

In a saturated and skeptical environment, they could once again become key determinants of advertising effectiveness. The question, then, is not whether to choose between performance and trust, but to recognize that performance without trust can become fragile.

Because an ad can lead to a conversion. But only trust can lead to lasting loyalty.

And in mature markets, preference is often the true driver of value. Performance can drive action, but trust drives preference. And preference creates lasting value.

Trust as a New Differentiator

While the past decade has been dominated by issues of targeting, distribution, and measurement, the coming decade could be marked by a return to a more fundamental factor: trust.

This is because, in an advertising ecosystem that has become extremely technically advanced, the gaps in raw performance between platforms are gradually narrowing.

• Targeting capabilities are converging.

• Optimization tools are becoming standardized.

• Ad buying technologies are becoming more widely available.

In this context, differentiation could gradually shift—no longer focusing solely on technical performance, but rather on the quality of the environments in which the messages appear.

In other words: the credibility of the media landscape could once again become a strategic factor.

Several recent studies on brand safety and media quality (including those by Integral Ad Science, DoubleVerify, and WARC) show that environments perceived as trustworthy not only improve brand perception but also enhance audience attention and ad recall.

This trend reflects a profound shift: advertising could gradually transition from an economy of exposure to an economy of validation.

With this in mind, environments capable of providing credible signals of trust could become the most distinguishing factor. Because in the future, the question may no longer be simply: “How many people saw this message?” but rather: “In what context was this message perceived?” and “With what level of credibility?”

Toward a New Architecture of Advertising Trust

This development could restore a strategic role to media environments capable of offering:

• credible editorial contexts

• defined audiences

• authentic interactions

• real-world usage evidence

Because in a world where attention-grabbing signals are multiplying, signals of trust could become the rarest of all. And as is often the case in the digital economy: what becomes rare becomes strategic.

The next frontier in advertising may not be technological. It could be relational.

Attention makes things visible. Trust makes things credible.

Explosion of fake reviews: regulation intensifies

For years, fake reviews were treated as a minor annoyance. A technical problem. An isolated incident.

In 2026, this is no longer the case. Authorities have realized that consumer reviews are no longer just a marketing tool. They have a direct influence:

• purchasing decisions,

• brand reputation,

• trust in platforms,

• and, more broadly, market integrity.

In the United States: the FTC cracks down

The Federal Trade Commission has adopted a specific rule targeting fake reviews and misleading testimonials. It now explicitly prohibits:

• the creation or sale of fake reviews,

• the use of artificially generated reviews,

• undisclosed testimonials from employees or partners,

• the selective removal of negative reviews.

Penalties can exceed $50,000 per violation.

This is not a cosmetic adjustment, it is official recognition of a simple fact: the manipulation of reviews has become a systemic threat. And the massive influx of AI-generated content only amplifies the risk.

United Kingdom: fines proportional to turnover

In the United Kingdom, the Digital Markets, Competition and Consumers Act significantly strengthens the powers of the Competition and Markets Authority.

Companies that publish or facilitate misleading reviews can now be fined up to 10% of their global revenue. The message is clear: the accuracy of reviews is no longer a matter of image. It is a matter of structural compliance.

Within the EU: growing pressure for transparency

The European Union, through the Digital Services Act (DSA), requires large platforms to :

• greater transparency regarding recommendation systems,

• enhanced moderation requirements,

• increased liability for the dissemination of misleading content.

In a context of explosive growth in AI-generated content, these requirements aim to prevent fake content from becoming commonplace.

The real issue: trust is becoming regulated

This regulatory tightening reflects a profound change. For years, trust was a competitive advantage. Today, it has become a legal requirement.

Because the proliferation of fake reviews, deepfakes, and synthetic content makes authenticity rarer—and therefore more strategic..

The more unstable the information environment becomes, the more the value of verified environments increases.

A paradoxical tension

What makes the situation particularly striking is the discrepancy:

• Regulators are stepping up protection against fake reviews.

• Consumers are demanding greater authenticity.

• Brands know that social proof is decisive.

And yet, advertising investments continue to be concentrated in environments where the mass production of AI-generated content makes verification more complex.

Regulation sends a clear signal: the battle is no longer just about attention. It’s about credibility.

Consumers demand authenticity and transparency

If regulation is intensifying, it is not solely at the instigation of the authorities. It is primarily because consumers have changed.

In an environment saturated with sponsored content, subtle placements, automated reviews, and algorithmic recommendations, vigilance has increased.

Audiences don’t reject advertising, they reject opacity. According to Nielsen’s Global Trust in Advertising Study, nearly 88% of consumers say they trust recommendations from people they know, and more than 70% trust online reviews when they are perceived as authentic.

This figure is fundamental: social proof remains one of the most powerful drivers of trust in contemporary marketing.

But this trust is no longer blind.

Conditional trust

The BrightLocal – Local Consumer Review Survey 2023 shows that:

• 82% of consumers say they have identified fake online reviews.

• A majority say that even a hint of manipulation is enough to significantly damage the perception of a brand.

In other words: consumers want reviews—but they know the ecosystem can be manipulated.

This tension creates a new implicit standard:

• The evidence must be visible.

• The origin must be identifiable.

• The context must be credible.

• The process must be transparent.

Without these elements, the opinion ceases to be a factor of confidence and becomes a factor of doubt.

The post-naivety era

We have entered a post-naivety era. Consumers know that:

• Reviews can be bought,

• influencers can be paid,

• ratings can be manipulated,

• comments can be generated by AI..

This lucidity does not lead to systematic rejection. It leads to an increased demand for transparency.

Audiences accept advertising. They accept reviews. They even accept commercial partnerships.

What they no longer accept is concealment.

Authenticity as a competitive advantage

Dans ce contexte, l’authenticité cesse d’être un supplément d’âme. Elle devient un avantage compétitif.

A brand capable of demonstrating:

• that its reviews come from real customers,

• that its testimonials are verified,

• that its evidence is traceable,

immediately reduces the level of cognitive friction.

Conversely, an environment where everything seems possible—false, exaggerated, amplified—generates information fatigue that penalizes even virtuous actors. Mistrust becomes widespread.

Strategic relocation

This change has a direct impact on the media and advertising. When authenticity becomes rare, environments that can offer the following become more valuable:

• a clear framework,

• editorial responsibility,

• assumed moderation,

• explicit verification,

The demand for authenticity is therefore not a marginal social phenomenon. It is a strategic variable that is redefining the hierarchy of advertising environments.

In a world where AI can generate thousands of credible reviews in a matter of seconds, the question is no longer simply, “Do consumers trust reviews?” But rather, “In what context, and under what guarantees, can this trust continue to be expressed in the long term?”

Attention and trust depend on the media context

Attention and trust do not exist in a vacuum. They are deeply influenced by the context in which a message is received.

The same advertising content does not have the same value depending on its surrounding environment. When broadcast in a saturated social feed, between AI-generated content, a controversial video, and a viral opinion, it is perceived as just one element among many—often indistinct, sometimes suspicious. When inserted into an editorialized, identified, and hierarchical media outlet, it benefits from a framework, implicit legitimacy, and a form of stability.

This phenomenon is not theoretical. Research conducted by FranceTV Publicité with Ipsos and Tobii on measuring attention shows that structured premium environments—particularly television—generate more seconds of attentive viewing than scrollable and skippable environments. Attention is less fragmented, less multitasking, and less defensive. It is more readily available.

But the issue goes beyond exposure time alone. The media context acts as a credibility filter. The media has legal, editorial, and institutional responsibilities. It selects, prioritizes, and verifies. This architecture creates a showcase effect: the advertising message is not isolated in an indistinct flow, but is integrated into a coherent whole.

Conversely, in environments where all content coexists on the same level—information, opinion, satire, fake reviews, deepfakes—the hierarchy disappears. The algorithm favors engagement, not reliability. Advertising is then exposed to the risk of contextual contamination: even if the message is rigorous, the context can undermine its perception.

In this case, trust no longer depends solely on the brand. It depends on the media that hosts it.

Studies by the Reuters Institute show that trust in information varies greatly depending on the channel through which it is disseminated. Established media outlets continue to be perceived as more reliable than content shared via social media platforms. This difference in perception is not insignificant: it influences how a commercial message is interpreted, remembered, and evaluated.

In other words, attention is measurable. Trust, on the other hand, is contextual.

And in an environment where AI makes the fake more credible and the real harder to distinguish, choosing the media context becomes a strategic act. It is no longer just a decision about coverage or performance. It is a decision about credibility.

While attention captures the gaze, context conditions interpretation. And it is this interpretation that ultimately determines the real impact of a message.

The flight of advertising investment: performance, but at what cost?

The growing concentration of advertising investment in digital platforms cannot be explained solely by technical or budgetary considerations. It is based on a promise of performance, real-time optimization, and granular targeting.

However, this dynamic is having a systemic effect. In France, traditional media—television, radio, and print—will account for only around 33% of the total advertising market in 2025, compared with 46% in 2021. Most of the growth is now being captured by the major global technology platforms.

This shift is not neutral. It changes:

• the structure of information financing,

• the balance of pluralism,

• and the ability of national media to invest in demanding content.

It was precisely this observation that led Publicis Media to launch the Media Citizen initiative. The stated ambition is clear: to reconcile media performance and pluralism by gradually reallocating a portion of investments to editorial environments—press, television, cinema—considered essential to public debate.

The idea is strategic: advertising doesn’t just fund impressions or clicks. It funds ecosystems.

In a context where so-called “traditional” media are struggling to maintain their economic balance, the issue is no longer just one of short-term ROI, but of the sustainability of the information model.

Brand safety: a risk that can now be measured

This observation ties in with another reality documented by brand safety studies.

According to analyses by Integral Ad Science (IAS), the presence of an advertisement near content deemed risky—misinformation, extreme discourse, artificially generated content—can lead to:

• a significant decline in purchase intent,

• a deterioration in brand perception,

• and a decrease in advertising recall.

DoubleVerify studies also confirm that premium editorial environments score higher on brand suitability than open, unmoderated environments, and generate higher levels of consumer trust.

In other words: gross performance does not always compensate for contextual risk.

The more saturated the digital ecosystem becomes with AI-generated content, the more the ability to guarantee a reliable environment becomes a competitive advantage.

Strategic tension

The paradox is striking. On the one hand, platforms offer:

• advanced optimization,

• real-time metrics,

• and unmatched targeting capabilities.

On the other hand, editorialized media provide

• a framework,

• legal accountability,

• a hierarchy,

• and increased protection against misinformation.

The Media Citizen initiative led by Publicis Media illustrates this tension: how can we reconcile the performance expected by advertisers with the need to support media environments that are fundamental to democracy?

The loss of advertising investment is therefore not just an economic problem. It raises questions about the model itself.

In a world where AI makes it impossible to distinguish between what is real and what is fake on a large scale, brand safety can no longer be reduced to a technical filter. It has become a strategic choice of context.

And this choice determines not only short-term advertising effectiveness, but also the long-term credibility of the ecosystem.

The issue is no longer just about protecting brands from risky environments. It is about protecting the public sphere from the erosion of truth.

…and why advertising is directly affected

For several years now, a vague unease has been spreading throughout the media ecosystem. It is not a sudden collapse or a spectacular crisis, but rather a slow, gradual, almost silent erosion: the erosion of trust.

The figures published at the end of 2025 in the Media Trust Barometer are clear. They do not reflect a sudden shift, but rather confirm a fundamental trend.

61% of French people say they distrust the media.

A relative majority considers media group concentration to be a democratic problem. And, even more strikingly, the most frequently cited criteria for trust are neither reputation nor broadcasting power, but the ability to demonstrate.

This observation goes far beyond the field of information. It also — and perhaps above all — concerns advertising.

Distrust is not an opinion. It is a signal.

When we analyse the results in detail, one thing stands out: mistrust of the media is not ideological. It is functional.

The French do not say they reject information as such. They express a growing difficulty in placing their trust without proof.

The criteria that define a ‘trustworthy’ media outlet today are clear:

• give priority to facts rather than opinions,

• acknowledge and correct mistakes,

• disclose sources and funding,

• offer a variety of viewpoints.

In other words, trust is no longer based on status. It is based on demonstration.

This shift is fundamental. It marks the end of a historically vertical model, where authority was sufficient, and the beginning of a horizontal model, where credibility is built continuously.

When editorial trust erodes, advertising trust follows suit.

This point is rarely stated explicitly, but it is central. Advertising does not exist in a vacuum. It is part of a context of reception. When the credibility of a media outlet weakens, it is not only its editorial content that is called into question — it is also all of the messages it disseminates, including commercial ones.

This is not a criticism of the media. It is a well-documented cognitive mechanism: trust is transitive. An environment perceived as opaque, polarised or difficult to verify automatically weakens the reception of the advertising messages displayed in it. This phenomenon partly explains:

• the decline in the incremental effectiveness of certain media investments,

• the rise in advertising distrust,

• and the increasing difficulty in creating lasting brand preference.

So the question is no longer just: ‘How many people have we reached?’

But: ‘In what climate of trust was this message received?’

Attention does not disappear. It becomes conditional.

Another key lesson emerges from recent debates — notably at Médias en Seine — and it deserves to be clarified: attention has not disappeared, even among the younger generations. But its nature has changed profoundly.

Despite the mistrust expressed towards the media, more than 70% of French people still say they follow the news with interest. This figure remains high, even if it has fallen slightly. It shows one essential thing: it is not disinterest that is growing, but the end of automatic trust.

This phenomenon is even more noticeable among younger audiences. According to several converging studies — Google/YouTube (Gen Z Decoded), Kantar Media Reactions, Deloitte Digital Media Trends — Gen Z does not have ‘less attention span’: it simply has much stricter acceptance thresholds. In practice, this means that:

• The first few seconds are used to decide whether content is worth spending time on.

• Any exposure perceived as useless, repetitive or not credible is immediately ignored.

• The authority of the media or brand is no longer enough to justify the attention given.

Google’s research shows that, for Gen Z, the first 5 to 10 seconds are decisive: not for understanding, but for assessing the value and credibility of a message. This point is often misinterpreted: it is not a lack of concentration, but a reflex for rapid sorting, forged in an environment saturated with content.

Less time allocated, more immediate demands

Kantar Media Reactions studies confirm this paradox: Gen Z is both the generation most exposed to messages… and the most critical of advertising. It rejects above all:

• formats deemed too long,

• messages perceived as “corporate” or self-declarative,

• unsubstantiated promises.

Conversely, it values:

• visible evidence

• real-life experiences,

• signs of authenticity and transparency.

In other words, the attention economy has become an economy of immediate credibility. It is not duration that is the problem. It is ‘unjustified’ time.

Research by TikTok Marketing Science shows that short formats (between 6 and 10 seconds) achieve the highest memorisation scores — provided that the message is perceived as sincere and credible from the very first seconds.

Brevity is therefore not an end in itself. It is a discipline.

The persistent misunderstanding about short formats

Many brands and media outlets continue to interpret this development as a constraint: ‘We have to make things shorter because people don’t have time anymore.’ This is a simplistic interpretation.

The real constraint is not time. It is proof. A short message without credibility is ignored. A short message that conveys a clear signal of trust, on the other hand, can become a powerful trigger.

In this context, continuing to communicate as if repetition or authority were sufficient amounts to ignoring a profound change in habits — particularly among the generations that will shape tomorrow’s audiences.

What this says about the future of media and advertising

We are entering a phase where:

• Short formats are becoming dominant,

• not because they are fashionable,

• but because they are compatible with attention spans that have become more demanding.

Effective formats now share three common characteristics:

1. they respect the audience’s time,

2. they spark interest without trying to convince immediately,

3. they open up a path for verification, rather than closing off the message

In a world where less than ten seconds can decide everything, the question is no longer: ‘How can I speak for longer?’ But rather: ‘How can I be credible more quickly?’

The case of social media and influencers: a false paradox

The figures are clear: social media and content creators are among the least trustworthy sources. And yet brands are investing heavily in them. Why?

Because these spaces offer something that traditional environments have sometimes lost: an illusion of proximity and verifiability.

It is not influence that creates trust. It is the ability to verify, to identify a voice, a face, a lived experience. When this proof is absent, mistrust reappears — sometimes even more violently.

The lesson is simple: trust does not come from audience size or format. It comes from the ability to connect a message to a real and relatable experience.

Media, brands, platforms: same fight, same challenges.

What these figures reveal is not the failure of the media. Nor that of advertising. Nor that of platforms.

This marks the end of a model based on credibility statements, in favour of a model based on contextualised evidence. In this new landscape:

• Authority is no longer enough,

• repetition no longer convinces,

• short-term performance no longer compensates for the erosion of trust.

The players who will succeed will not be those who speak the loudest, but those who can demonstrate why their messages deserve to be believed.

Conclusion: trust can no longer be imposed

The figures from the Media Trust Barometer are not a passing warning. They are a structural signal, one that brands, media outlets and platforms can no longer ignore.

Trust can no longer be decreed. It must be demonstrated. And in a world saturated with messages, demonstration becomes the real competitive advantage.

Each row shows three values: the share of respondents who cite the criterion as their primary trust factor, those who consider it important but not decisive, and those who do not see it as a key element of media trust.

The central paradox: social networks are used extensively… but are highly unreliable

Social media platforms have never played such a central role in Europeans’ daily lives: according to GWI (2024), we now spend more than two hours a day on them. This massive presence might suggest fertile ground for commercial communication. But the data paints a very different picture.

According to the Edelman Trust Barometer (2024), less than a third of European citizens say they trust the content they encounter online. And recommendations from influencers, despite their ubiquity, convince less than 20% of consumers (Kantar, Media Reactions 2023).

This profound disconnect — high consumption but low confidence — is what analysts now refer to as the integrity gap: an environment where the abundance of signals contrasts with the fragility of their credibility.

A structural confidence deficit

This discrepancy is not the result of an isolated phenomenon but rather a combination of factors:

• the proliferation of sponsored content;

• insufficient transparency around commercial partnerships;

• an erosion of perceived authenticity as creators professionalise their activity;

• regular scandals related to fake followers, bots and artificial engagement;

• and the increasing difficulty for users to distinguish between a sincere testimonial and a paid narrative.

In this context, influence suffers from a fundamental bias: as soon as content is remunerated, it is spontaneously interpreted as a form of advertising.

This interpretation is all the more valid given that, as Nielsen (Global Trust in Advertising) points out, sponsored messages disseminated by influencers are viewed with the same caution — or even mistrust — as traditional advertising messages.

In other words: The story of a paid influencer does not speak ‘as a peer’, but as an additional advertising medium. And audiences are no longer fooled by this.

Influence: real reach, limited credibility

It is no coincidence that influence continues to grow in marketing budgets (+72% in 2026 according to Kolsquare): it allows brands to quickly reach engaged communities, multiply touchpoints, and embody brand messages with proximity.

But behind this dynamic, one thing is clear: influence has undeniable reach, but limited credibility. The data is unequivocal.

Low, documented and persistent confidence

According to Nielsen Global Trust in Advertising,

• Only 33% of consumers trust recommendations from influencers,

• while 70% trust consumer reviews, even anonymous ones.

Kantar’s Media Reactions study (2023) points in the same direction:

• Influencer content ranks among the least credible commercial formats,

• just above digital banners… and far behind certified reviews or word of mouth.

At European level, the EU Digital Services Consumer Survey (2024) states:

• 63% of respondents believe that influencers ‘say what the brand wants to hear’,

• and 57% perceive their sponsored content as ‘disguised advertising’.

In other words: Influence speaks loudly, but it no longer convinces as easily.

a. Trust automatically falls with remuneration

Harvard Business Review (2023) demonstrated a simple but essential phenomenon: when consumers know that a creator is being paid, perceived trust drops by an average of 18%. This loss of credibility is not marginal: it is structural.

The more a designer is recognised as a ‘professional’,

• the more his activity is perceived as a business,

• the more his independence of judgement is called into question.

Influence is therefore caught in an operational paradox:

• Amateur creators are perceived as credible but lack reach,

• professional creators have reach but lack credibility.

b. An audience that consumes… but no longer believes

The GWI 2024 report shows that:

• 76% of influencer interactions come from 16–34 year olds,

• but 64% of this population believe that influencers ‘are too commercial’,

• and 52% say they ignore sponsored content ‘on principle’.

It is not a lack of interest in the influencer. It is a cognitive mechanism of self-protection against excessive commercial solicitation. The audience scrolls, watches, enjoys, but no longer believes.

c. Influence = publicity: an equation perceived as obvious

The very nature of the creators’ business model requires a form of narrative alignment with the brand:

• well-defined content,

• approved messages,

• consistent storytelling,

• carefully crafted presentation.

From a consumer perspective, this brings the influencer closer to the brand itself. That is why, as Nielsen points out, sponsored content posted by creators is no longer interpreted as testimonials, but as extensions of advertising: an additional channel, a paid vehicle. In any case, not a credible peer.

This is not a criticism of the profession but a perceptive reality — deeply rooted and measured.

d. What this means for brands

All the data points to influence:

• generates visibility,

• stimulates engagement,

• fuels consideration,

• but is not a sign of trust.

Influence remains relevant for informing, entertaining or activating… But its role in reassurance, proof and credibility has become marginal. One conclusion emerges: Influence is not in a crisis of audience — it is in a crisis of trust.

And at a time when consumers are demanding authentic and audited signals, this distinction is becoming central to advertising effectiveness.

Civil evidence: a new currency of trust in a market saturated with promises

While influence has profoundly transformed the way brands communicate, it has not resolved the central issue: trust.

However, data shows that this is no longer being rebuilt using traditional channels (advertisements, creators, sponsored content), but rather using a different type of signal: the verified experience of real customers, expressed in the form of certified reviews.

In a market saturated with messages — between 2,000 and 15,000 per day according to Yankelovich Research and Forbes — evidence has become a rare resource and the primary factor in persuasion.

1. Certified reviews: a signal perceived as inherently reliable

All studies agree: consumers overwhelmingly trust the opinions of other buyers, even strangers. Some key data:

BrightLocal 2024 :

• 49% trust online reviews as much as they trust the opinions of friends and family.

• 70% read between 5 and 10 reviews before making a purchase.

• ‘Authenticated’ reviews — clearly identified as verified — increase conversions by 18 to 28%.

Nielsen Global Trust in Advertising :

• Consumer reviews (even anonymous ones) are the number one format in terms of trust, ahead of word of mouth and far ahead of advertising (22%) and influencers (33%).

Bazaarvoice / Northwestern University :

• Adding a moderate negative review — known as the ‘imperfection paradox’ — increases overall credibility by 25%.

• Products with at least five verified reviews see their conversion rate increase by 21%.

Experienced evidence is more persuasive than the best narrative.

2. Why are certified reviews more reassuring than advertising or influencers?

Three fundamental reasons emerge from European studies:

a. Indépendance perçue

• A review is submitted by a customer with no contractual relationship.

• This customer feedback does not follow a script.

• This opinion reflects actual usage, not an editorial line.

b. Confirmation bias

Advertising exposes when reviews are valid or invalid. Consumers use reviews as a verification filter: ‘Is what the brand promises confirmed by others?’

c. Risk reduction effect

The more the choice involves cost, commitment or risk of error, the more opinions become decisive — particularly in:

• automobiles,

• household appliances,

• insurance,

• tourism,

• telephony/internet.

Evidence helps to avoid post-purchase regret, which behavioural psychology refers to as the risk-mitigation effect.

3. Certification as a key element: NF522 and ISO 20488

The effectiveness of reviews depends on their perceived reliability. This is where standards come in.

NF522 / ISO 20488: the trust framework. These standards guarantee that:

• reviews come from authenticated customers,

• each review is verified,

• no reviews are purchased,

• no reviews are deleted for commercial reasons,

• moderation follows a transparent protocol,

• all data is traceable and audited.

This level of rigour transforms the opinion into a reliable, enforceable, comparable and actionable signal in marketing strategies.

This is the major difference between structured evidence and spontaneous opinion.

4. The evidence covers all stages of the buying cycle

The work carried out by Stars & Stories/BuyTryShare has demonstrated that certified reviews influence all four stages of the purchasing journey:

First, Awareness

Reviews increase visibility in search engines via rich snippets.

→ +7% to +30% clicks according to BrightLocal.

Then comes Comparison (Consideration)

Consumers use reviews as their number one criterion for deciding between similar products.

→ Decisive in food, cosmetics and electronics.

Next is the Purchase (Decision)

Certified reviews increase conversion rates by 18% to 28%.

→ Particularly strong effect on high baskets

Finally, there is the post-purchase evaluation (Evaluation).

Reviews fuel the cycle of trust.

→ 47% of shoppers say they are willing to leave a review (Stars & Stories, 2024)

Evidence no longer serves to validate the end of the process: it structures the entire cycle.

5. Why does evidence trump influence?

By cross-referencing all the data (Nielsen, BrightLocal, Northwestern, BuyTryShare), a clear pattern emerges:

The conclusion is clear: influence entertains. The evidence is convincing.

Conclusion: An industry that can no longer ignore the evidence

The transformations observed in these lines all follow the same trajectory.

On the one hand, influencer platforms are attracting increasing attention — but trust in them is eroding.

Advertising overload, creator remuneration and content scripting now limit the real impact of recommendations: they sometimes inform, they often entertain… but they no longer convince.

On the other hand, consumers are shifting their trust towards signals that are perceived as independent, authentic and verifiable: certified reviews.

They are becoming the new grammar of credibility: a language where proof takes precedence over promises, where lived experience takes precedence over storytelling, where peer validation takes precedence over staging.

This development is not insignificant: it overturns the hierarchy of signals that influence purchasing decisions.

In this context, brands wishing to restore trust can no longer rely solely on creativity, influence or repetition. They must incorporate an essential element into their strategies: proof, in the strict, structured and certified sense (NF522 / ISO 20488).

It is precisely this shift — from discourse to evidence — that opens up a new field of opportunities for the advertising ecosystem.

Only when a brand is able to show what its customers are really experiencing does it regain that fundamental lever that audiences have been demanding for years: trust.

The traditional digital environment is in crisis

Data from 2025 confirms a trend: the ‘all digital, all reach’ approach is beginning to show cracks.

a) Platform moderation is changing

A report by eMarketer, Brand Safety on Social Media in 2025 (April 2025), warns of a shift: some major platforms — such as Meta Platforms (Facebook/Instagram), TikTok and X — are moving from platform-led moderation to a community model where users report and moderate content.

➡️ Result: the platform’s direct responsibility diminishes — and, as a knock-on effect, control over advertising environments becomes weaker.

b) Confidence is declining — or at least, it is no longer increasing

Similarly, a study of multiple sources (e.g. Amra & Elma) shows that only 39% of consumers say they trust advertising in 2025..

Furthermore, for nearly 30% of marketers, a poorly controlled advertising environment has already led to a loss of consumer confidence or a decline in brand sentiment. (Figure estimated based on brand safety reports)

c) “Targeting is no longer enough”

These facts raise a fundamental question: What is the point of ultra-precise targeting if the environment in which the advertisement appears is questionable?

A well-calibrated message juxtaposed with toxic, extremist or fraudulent content may generate impressions… but it can also damage the brand, erode reputation and undermine trust.

Illustration: an advert inserted into an unmoderated influencer’s feed or alongside problematic content can reach thousands of people – but at what cost? Return on investment is no longer measured simply in GRP, but in trust gained or lost.

Integrating these three aspects — platform changes, declining trust, and the inadequacy of targeting alone — reinforces the argument that the ‘traditional’ digital environment no longer guarantees brand safety or advertising effectiveness.

Traditional media regains value

a) Superior editorial and regulatory control

These media operate in clearly regulated environments: editorial charters, advertising regulations, audience audits. This regulation provides a guarantee of quality for advertisers.

For example, according to ExchangeWire in its article ‘Navigating Brand Safety in 2025’:

‘In 2025, brand safety continues to evolve… The goal remains to keep advertisements away from harmful content, but the focus is now on brand suitability, ensuring that advertisements appear in environments that reflect a brand’s values and tone.’

b) A high-end context, perceived as more reliable by consumers

Consumers often associate the press, television or cinema with a certain legitimacy — which is no longer always the case in certain digital environments. The traditional media ‘label’ acts as a sign of trust.

This perception translates into an advantage for advertisers: advertising messages broadcast in these media benefit from a high level of attention and an environment perceived as “safe”.

c) An attentive audience, less distracted, more engaged

Unlike fragmented digital flows — multi-screens, multitasking, advertising layers — traditional media offer key moments of engagement: prime-time television, cinema coverage, and ‘must-read’ newspaper pages.

This increased attention translates into value for the brand: less ‘noise’, more reception. And in a market where trust is a rare commodity, this attentive engagement makes perfect sense.

What this means for brands

a) Rethinking priority: from volume to context

Rather than accumulating impressions or endlessly refining targeting, the challenge today is to ask ourselves: in what context will my message be perceived as credible?

Because a well-targeted campaign that is disseminated in an unreliable environment is bound to generate exposure… but little trust.

Brands must choose not only who they reach, but where they reach them — and that “where” is now part of the brand promise.

b) Traditional media: modern arbitration

Choosing television, newspapers or cinema is not a step backwards. It is a strategic decision:

• Less fragmentation: a message delivered in a place where attention is focused and the audience is receptive.

• Greater control: these media are governed by editorial and technical regulations that enhance their stability and clarity for advertisers.

• Greater trust: consumers continue to associate these media with quality, legitimacy and credibility.

In a context where confidence is wavering, this stability becomes a differentiating advantage.

c) The key role of visible and activated evidence

To truly capitalise on this momentum, it is not enough to simply shift the budget. A signal of proof must be incorporated:

• Certified customer reviews, verified according to standards such as ISO 20488 or NF522 — a guarantee of authenticity.

• Integration of these reviews into the media itself (television, press, cinema) — making the customer’s voice a creative component of the message.

• The message then shifts from ‘we are good’ to ‘people like you say it’s good’.

This visible proof transforms exposure into engagement: it establishes a tangible bond of trust in a premium context. In this model, targeting and format remain important — but what differentiates a campaign that reaches an audience from one that converts is the credibility it conveys.

In summary: for brands in 2025, advertising effectiveness is no longer achieved solely through reach or precision. It is achieved through the choice of context and the signal of credibility it activates. By focusing on reliable media and integrating visible customer proof, brands transform a media investment into a brand asset — not just a distribution cost.

Certified customer proof: a driver of efficiency and credibility

In a world saturated with advertising, brands can no longer simply say they are trustworthy — they must demonstrate it. This is where certified customer proof comes in: it transforms a promise into a visible experience.

a) Standards and rigour: guaranteeing authenticity

When we talk about “certified” customer proof, we are not just talking about another review: we are talking about a structured, verified, transparent process.

The ISO 20488:2018 standard – Online consumer reviews – defines the requirements and recommendations for the collection, moderation and publication of online customer reviews. A compliant review system therefore guarantees that:

• The author is a genuine customer.

• The review is linked to a purchase.

• Moderation is objective and documented.

• Publication is transparent with regard to the rules applied.

For brands, this level of rigour is a strong guarantee: the review can no longer be perceived as ‘bought’ or manipulated, it becomes a sign of trust.

b) From customer reviews to media messages: visible proof

The real revolution comes when this customer feedback is incorporated into the advertising format itself: TV commercials, press inserts, cinema adverts, etc.

Imagine a 5-second TV advert ending with: ‘Marie, buyer of car X, gives it a 9/10 rating and recommends this model. Like other TV Reviewers.’

This simple addition radically changes the nature of the message:

• We are moving from brand-driven discourse to peer-validated testimonials.

• Consumers don’t just read that ‘this product is good’; they see that a customer like them says it is.

• In concrete terms, this increases credibility — and therefore attention, memorisation and conversion..

Recent studies show that user testimonials are particularly effective when:

• they are perceived as authentic,

• the source is similar to the target audience (peer ‘like me’),

• the format is short but visible in a premium media context.

The effect? The audience is less sceptical, more willing to believe, and therefore more willing to act.

c) Why it is a strategic lever for brands

In a world where:

• Trust in digital environments has been undermined,

  Targeting alone is no longer enough to win people over,

• the choice of media context (television, press, cinema) has once again become central…

…Certified customer proof acts as the bridge between the message and the impact.

It plays three strategic roles:

1. Credibility segmentation: being seen in a premium context and by a credible signal strengthens engagement.

2. Media amplification: premium media attracts attention, proof builds trust — together, they increase effectiveness.

3. Brand protection: better context + authentic proof reduces the risk of rejection, inauthenticity or reputational backlash.

In summary: Certified customer proof is not a decorative detail of the campaign: it becomes a central element of credibility. Integrated into a premium media format, it transforms advertising from ‘look at us’ to ‘listen to those who have done it’.

For any ambitious brand, the choice is now clear: choose power AND proof, rather than power alone.

Practical recommendations for advertisers

If you are in charge of a media strategy:

1. Audit your media mix: what proportion of your budget is invested in high-risk environments versus safe media?

2. Redefine your KPIs: don’t settle for GRP or CPM anymore. Add ‘visible proof activated’, ‘customer reviews cited’ and ‘certified media context’.

3. BuyTryShare procedure in 4 steps:

   • Collect verified post-purchase reviews.

   • Select premium media inventory (television, press, cinema).

   • Integrate reviews into advertising creative.

   • Measure the impact on trust and conversion.

4. Case study: a brand decides to redirect 20% of its social media investments towards TV + integrated customer proof. The result? A 12% increase in engagement, a rise in recommendation rates, etc. (hypothetical data for illustrative purposes only)

Conclusion

By the end of 2025, the media ecosystem will no longer be solely focused on volume. It will be focused on credibility.

Brands that are content to merely achieve will no longer stand out. Those that build trust — through visible proof and reliable media — will create a competitive advantage.

With BuyTryShare, this transition becomes a reality: moving from exposure to conviction, from promise to proof.