Why can one person casually mention a moisturiser on TikTok and thousands of people immediately want to try it, while another can produce an immaculate, professionally edited advertisement and barely persuade us to stop scrolling?
It isn’t simply about beauty, follower numbers or charisma.
The most effective influencers understand, consciously or otherwise, something fundamental about human psychology:
We are more easily influenced by people we trust, relate to and feel we know.
This is what makes modern influencer culture so psychologically fascinating. Traditional advertising talks at us. Successful influencers create the feeling that they are talking to us.
And research is beginning to explain why that difference is so powerful.
Influence begins with trust
One of the most consistent findings in influencer research is the importance of credibility.
A large meta-analysis examining 53 studies found that credibility, trustworthiness and perceived expertise were important predictors of how audiences responded to influencers.
This makes intuitive sense.
If I believe you know what you’re talking about, that you generally tell the truth and that you wouldn’t recommend complete rubbish simply because somebody paid you, your opinion has value to me.
But credibility isn’t quite the same thing as expertise.
You don’t necessarily need a PhD in dermatology to influence somebody’s choice of moisturiser.
Sometimes:
“I’ve got the same dry skin as you and this is the only thing that’s helped me”
is psychologically more persuasive than:
“Clinical testing demonstrates a 37% improvement in skin hydration.”
Why?
Because another psychological mechanism has entered the room:
similarity.
We are influenced by people who seem like us
Psychologists use the term homophily to describe our tendency to connect with people whom we perceive as similar to ourselves.
They might share our values, humour, lifestyle, age, interests, problems or outlook on life.
Research on influencers has found that perceived similarity is associated with both credibility and the development of parasocial relationships.
In other words:
“She gets me.”
can become:
“I trust her.”
which can eventually become:
“If she likes it, perhaps I will too.”
This is one reason a relatively ordinary-looking creator talking from their bedroom can sometimes have more persuasive power than a perfectly polished celebrity campaign.
We may admire celebrities.
But we often identify with influencers.
Authenticity: the currency of influence
Authenticity is perhaps the most overused word in social media, but psychologically it matters enormously.
Research has found that perceived authenticity contributes to stronger relationships between influencers and their followers.
But there is a catch.
A 2026 systematic review of 138 peer-reviewed studies describes an “authenticity paradox” in influencer marketing.
An influencer becomes successful because people experience them as genuine.
Success brings commercial opportunities.
They begin promoting more products.
Their audience becomes increasingly aware that their attention is being monetised.
And suddenly the very success created by authenticity can begin to undermine perceptions of authenticity.
This explains why audiences sometimes turn on influencers who appear to become walking advertising boards.
Five years ago they were saying:
“Guys, I found this amazing shampoo in Boots.”
Now every third post seems to begin:
“I’m SO excited to partner with…”
Followers aren’t stupid.
Once we start wondering whether somebody genuinely likes something or has simply been paid enough to say they do, the psychological relationship changes.
Authentic doesn’t mean revealing everything
There is another important distinction.
Authenticity doesn’t require telling millions of strangers every intimate detail of your life.
Successful authenticity is more about congruence.
Does the person you present online appear consistent with your behaviour?
Do your recommendations make sense given what you’ve previously said?
Do your commercial partnerships fit your identity?
Do you admit mistakes?
Do you occasionally say that you don’t like something?
Ironically, somebody who dislikes products occasionally may become more commercially influential, because their positive recommendations carry greater credibility.
If everything is “obsessed”, “life-changing” and “literally the best thing ever”, those words eventually become psychological wallpaper.
The strange power of the parasocial relationship
Perhaps the most fascinating part of influencer psychology is the parasocial relationship.
This is a one-sided relationship in which we feel that we know somebody who doesn’t actually know us.
You know what coffee they drink.
You’ve seen their kitchen.
You know their dog’s name.
You’ve watched them cry after a breakup.
You’ve seen them without makeup.
You know what they bought their mother for Christmas.
They have absolutely no idea who you are.
Yet psychologically, they can begin to feel familiar.
And familiarity is powerful.
Research has repeatedly linked parasocial relationships with influencer effectiveness and purchasing intentions. One study comparing several influencer characteristics found parasocial relationships had a stronger relationship with purchasing intention than expertise or trustworthiness alone.
More recent research has suggested a pathway that looks something like:
Credibility → Emotional connection → Trust → Influence
This helps explain why follower count alone is a fairly crude measure of influence.
A creator with 50,000 deeply engaged followers may have more psychological influence over their audience than somebody with two million largely indifferent ones.
Self-disclosure helps us feel that we know somebody
Successful influencers often reveal enough imperfection to feel human.
They talk about mistakes.
They show embarrassing moments.
They admit insecurity.
They occasionally appear without the immaculate lighting.
Research has investigated this type of self-disclosure, and there is evidence that personal disclosure can strengthen aspects of the relationship between influencer and follower.
But again, there’s a balance.
Too little disclosure and someone can feel remote.
Too much can feel uncomfortable, performative or manipulative.
The sweet spot appears to be:
“I’m allowing you to see something real about me.”
rather than:
“Every private experience is now content.”
Consistency creates familiarity
Another ingredient is simple repetition.
If someone appears in your feed three times a week for several years, they become familiar.
You recognise their voice.
Their facial expressions.
Their humour.
Their opinions.
Their kitchen.
Humans generally find familiar things easier to process, and repeated exposure can increase feelings of familiarity and liking.
Successful influencers therefore aren’t necessarily producing a masterpiece every day.
They are showing up consistently enough to remain psychologically present.
That matters enormously.
Emotion beats information
The most memorable influencers also make us feel something.
They make us laugh.
They inspire us.
They surprise us.
They make us feel understood.
They sometimes annoy us.
Emotion creates attention and memory.
Pure information is useful, but information wrapped inside personality and story is considerably stickier.
This is why:
“Here are five scientifically supported ways to improve your morning routine”
may be less compelling than:
“I spent ten years starting every morning feeling exhausted. Here’s what finally changed it.”
The information may be almost identical.
The second contains a human story.
Successful influencers usually have a recognisable identity
The strongest influencers also tend to occupy a fairly clear psychological territory.
You know roughly what you’re going to get.
Fitness.
Beauty.
Parenting.
Mental health.
Fashion.
Humour.
Personal finance.
Travel.
Or sometimes simply a distinctive personality through which many subjects are filtered.
This creates a kind of mental shortcut.
When we think:
“Skincare”
a particular creator may come to mind.
When we think:
“Budget travel”
another does.
In marketing this is positioning, but psychologically it is about association and memory.
Trying to appeal to everybody can actually make somebody less memorable.
Expertise matters, but it needs warmth
Research also suggests that perceived expertise contributes to credibility.
But expertise without warmth can create admiration without connection.
Warmth without competence can create affection without authority.
The particularly influential creator often combines both:
“I like you.”
and
“I think you know what you’re talking about.”
That’s a powerful combination.
Real-life example: Emma Chamberlain
Emma Chamberlain is a particularly interesting example because her success violates several of the old rules of celebrity.
She began posting YouTube videos as a teenager and became known for content that was deliberately less polished than traditional influencer content.
Awkward moments stayed in.
Her humour was self-deprecating.
The editing was unconventional.
She talked openly.
She appeared imperfect.
And audiences loved it.
Chamberlain now has more than 12 million YouTube subscribers and around 15 million Instagram followers, and her influence has extended into partnerships with luxury brands including Louis Vuitton, Cartier and Lancôme, as well as her own coffee company.
What is psychologically interesting is that increasing fame hasn’t entirely destroyed the original perception of accessibility.
Vogue has described the appeal of Chamberlain in terms of approachability, vulnerability and authenticity. Even after entering the extremely polished worlds of high fashion and the Met Gala, she has retained aspects of the slightly awkward, conversational persona that initially attracted followers.
Her success illustrates several of the research findings beautifully:
Authenticity.
Relatability.
Self-disclosure.
Distinctive personality.
Consistency.
Parasocial connection.
And crucially, evolution without completely abandoning the original identity.
Her audience grew up with her.
That creates something advertising money alone cannot easily purchase:
history.
The contrasting example: Caroline Calloway
Caroline Calloway provides an almost perfect illustration of the difference between getting attention and maintaining credibility.
Calloway became an early Instagram celebrity by documenting a romanticised version of her life at Cambridge University. Her lengthy captions and carefully constructed world attracted hundreds of thousands of followers and eventually helped secure a major book deal.
She was, by any reasonable definition, extraordinarily good at attracting attention.
But problems arose when the gap between the story being presented and what audiences believed they were actually receiving became part of the story itself.
The book deal collapsed.
Then came a much-publicised series of creativity workshops. Tickets cost around $165, but the planned tour descended into chaos, with cancelled events and criticism over organisation and whether what had been promised was actually being delivered. Many ticket holders were refunded.
Calloway subsequently leaned into the controversy, even incorporating the idea of being a “scammer” into her public persona.
This is important because she didn’t simply disappear.
In some ways, controversy became another form of content.
But psychologically her story illustrates a crucial distinction:
Attention is not the same thing as trust.
You can become famous because people admire you.
You can also become famous because people cannot stop watching the chaos.
Both generate clicks.
They do not necessarily generate the same kind of influence.
The trust account
I sometimes think of influencer credibility as a psychological bank account.
Every useful post makes a small deposit.
Every honest recommendation makes a deposit.
Admitting that something didn’t work makes a deposit.
Responding thoughtfully to followers makes a deposit.
Showing genuine expertise makes a deposit.
Keeping promises makes a deposit.
Then come the withdrawals.
Promoting something obviously unsuitable.
Failing to disclose advertising.
Recommending everything offered to you.
Contradicting yourself without explanation.
Selling something that doesn’t deliver.
Treating followers simply as customers.
One withdrawal won’t necessarily empty the account.
But repeated withdrawals eventually matter.
And once trust has gone into overdraft, a million followers won’t necessarily rescue it.
Why smaller influencers can sometimes be more persuasive
This also helps explain the rise of micro-influencers.
Someone with a smaller following may feel less like a celebrity and more like a knowledgeable person within your social world.
Their audience may interact with them more directly.
They may reply to comments.
Their recommendations may feel less industrialised.
They may also occupy a very specific niche.
If I want advice about running shoes for women over 50, the creator with 30,000 followers who has spent six years reviewing running shoes may be considerably more useful to me than a global celebrity with 20 million followers holding a trainer in a sponsored photograph.
Influence depends on relevance, not simply reach.
Why some influencers fail
When influencers struggle, several psychological ingredients are often missing.
They may be inconsistent.
Their content may be visually impressive but emotionally empty.
They may copy whatever is currently trending without developing a recognisable identity.
They may talk constantly but reveal very little of themselves.
Or they may do the opposite and overshare so relentlessly that intimacy begins to feel manufactured.
They may accept too many commercial partnerships.
They may lack genuine expertise.
They may focus obsessively on follower numbers rather than relationships.
And sometimes they make the biggest mistake of all:
They try too hard to influence.
People don’t particularly enjoy feeling manipulated.
The moment we become acutely aware that somebody is attempting to persuade us, our psychological defences can rise.
The paradox of influence is therefore that the most influential people often don’t feel as though they’re influencing us.
They feel as though they’re:
showing us, telling us, entertaining us, helping us or sharing something with us.
The persuasion arrives almost sideways.
What can we learn from successful influencers?
Whether you’re trying to build a TikTok account, promote a business, communicate mental-health information or simply understand why certain people dominate social media, the psychology points towards several principles.
Be recognisable. Develop a voice rather than copying everyone else’s.
Be useful. Give people something worth returning for.
Be credible. Know your subject and acknowledge what you don’t know.
Be human. Perfection creates distance.
Be consistent. Trust develops over repeated interactions.
Be selective commercially. If everything is an advertisement, nothing feels like a recommendation.
Create connection rather than simply collecting followers.
And perhaps most importantly:
Don’t manufacture authenticity.
The audience eventually notices the machinery.
The great paradox of influence
The most psychologically powerful influencers make thousands or millions of people feel that the communication is somehow personal.
They combine familiarity with novelty.
Expertise with warmth.
Aspiration with relatability.
Confidence with vulnerability.
And public performance with enough genuine personality that we feel we can see the human being underneath it.
That’s why influencing is much more complicated than accumulating followers.
A follower is simply somebody who pressed a button.
Influence begins when they start believing you.
