Quick Summary
Social media consumer behaviour is largely driven by identity. People follow, share and comment to say something about themselves, so a brand that gives them something to say travels further than content by the brand.
Likes mostly reflect preference that already existed on some level. Across five experiments and two meta-analyses with more than 14,000 people, getting someone to “like” a brand post didn’t improve their attitude towards it or their purchasing.
High-arousal emotions get shared. Awe, anger and anxiety spread; sadness stalls. Anger spreads well, but is a poor basis for a long-term strategy.
Social proof compounds on the feed. Visible popularity attracts more popularity, which makes early signals powerful and also makes them a weak measure of quality.
Your brand foundations decide what social media amplifies. A clear position gets multiplied, but so does an unclear one.
It’s 23:40. You’re in bed, thumb on autopilot, scrolling past reel after reel, and a post from a skincare brand stops you for a second. Nice photo, clever caption. You double-tap to like and keep on scrolling. By morning you couldn’t name the brand even if someone paid you.
On Monday, that double-tap turns up in a marketing report as engagement, sitting in a chart that’s gently trending upwards, and someone in the meeting says the brand is “really connecting with its audience”.
Both of these moments are tied to social media consumer behaviour, and only one of them actually describes what the person actually did. The void between the two is where a lot of social media marketing budget quietly gets sucked into. This article is about closing it by helping you to understand what people genuinely do on social platforms, the psychology behind each behaviour, and which of those behaviours move anyone closer to buying.
What is social media consumer behaviour?
Social media consumer behaviour & consumer behaviour in social media (definition):
Studying how people discover, evaluate, discuss, create and buy around brands on social platforms, and the psychological motives behind each of those actions.
The useful word in that definition is each. Treating everything people do on social media as “engagement” hides the fact that different actions come from different needs.
Researchers at the University of Amsterdam, Daniël Muntinga, Marjolein Moorman and Edith Smit, studied what they called COBRAs (consumers’ online brand-related activities) and sorted them into three levels of activity:
Consuming means watching, reading and scrolling past brand content. It’s driven mostly by entertainment and information.
Contributing means liking, commenting and joining a conversation. Social interaction and a sense of belonging start to matter here.
Creating means posting your own reviews, photos or videos about a brand. This is where personal identity and a feeling of influence over the brand becomes important to the user.
Each level of activity has a completely different ask from the brand. Someone quietly consuming wants to be informed or entertained without effort. Someone creating wants a stage. When a report adds all of it together and smushes it all under one “engagement rate”, you lose the thing that would actually help you decide what to post next.
If you’re looking for the wider framework where these behaviours come from, my complete guide to consumer psychology covers a lot of behaviour that feed into it, and my buyer psychology guide picks up at the moment a scroller turns into a buyer.
Why do people share content on social media (from a psychology point of view)?
People share mainly to shape how others see them and to stay connected to the people they care about. The content is often a just a mere vessel for the sharer’s identity, which is why the most shared brand content tends to be about the audience rather than the brand itself.
In 2012, Harvard psychologists Diana Tamir and Jason Mitchell ran a series of experiments in which people chose between answering questions about themselves or about others, with small cash prize attached to each option. Participants consistently gave up money for the chance to talk about themselves, and disclosing personal information activated the brain’s reward centre, the very same mesolimbic dopamine system that responds to things like food and money. Talking about ourselves is, quite literally, rewarding.
Social media is a machine for doing exactly that at a very large scale, which fro brands can be both very uncomfortable and useful at the same time. When people share brand content, they’re usually sharing a piece of themselves that your brand happened to supply. Sometimes that might be good, but most often people are more inclined to share the bad experiences and social media is known to reward drama with more likes and watch time.
Spotify Wrapped is the cleanest example I know. Every first week of December, feeds fill up with screenshots of people’s listening stats and top songs. Spotify’s branding is visible in every single post, yet each post is about the person who shared them: their taste, their quirks, the earworm song they played 300 times. Spotify supplies the material and the audience supplies the reach, and as a result Spotify gets a whole lot of free marketing with low development costs (at this point the underlying mechanism is already there, what changes are mainly the visuals at this point).
The legendary “Share a Coke” campaign that is revived every now and then also makes more sense through this lens. According to Coca-Cola’s own account of how it started, the idea came out of research in Australia in 2011: young adults loved the brand’s scale but felt it wasn’t talking to them at eye level. Swapping the logo for the 150 most popular first names fixed that problem physically, on the bottle. People photographed their own names, their partner’s, their best friend’s, and posted them. That summer, Coca-Cola says it sold more than 250 million named bottles and cans in a country of just under 23 million people. Crazy, right?
The social media activity was the result of a consumer insight, and the insight was the result of research.
Share a Coke campaign is an excellent example of making the brand about the consumer to earn more visibility on social media. / Image: Coca-Cola
What makes content go viral?
Content spreads when it creates physiological arousal aka strong emotions. Awe, anger, disgust and anxiety push people to pass things on, while sadness tends to make them sit still.
Wharton’s Jonah Berger and Katherine Milkman analysed every New York Times article published over a three-month period to see which ones made the most-emailed list. Content that evoked high-arousal emotions was shared more, and sad, deactivating content less. Positive content outperformed negative content overall, and the effects held even after controlling for how surprising, interesting or practically useful an article was.
Two things to note, though. Firstly, this was email sharing of news articles, so treat it as a principle about human arousal and not as a formula for any particular platform. Secondly, anger works, which is exactly why so much of the internet seems designed to make you furious. A brand that builds engagement on outrage is borrowing attention against its own trust, and that loan will be collected at some point at a very high interest. If you want people to feel something strongly, awe, surprise and delight are safer places to start, and the psychology of brand storytelling is a better source of ideas than angry comment section.
Do social media likes and followers lead to sales?
Not on their own. The best evidence suggests that likes and follows mostly reveal the people who were already fond of a brand, rather than turning neutral people into customers.
In 2017, a team led by Harvard Business School’s Leslie John published a paper in the Journal of Marketing Research with the wonderfully blunt title “Does ‘Liking’ Lead to Loving?” Across five experiments and two meta-analyses with more than 14,000 participants, they separated people who were nudged into “liking” a brand on Facebook from people who were just as fond of it but weren’t. Brand attitudes and purchasing were predicted by the fondness people already had. Whether and when they clicked “like” made no difference.
The second finding is the one I find most interesting as someone with a psychology background. When people saw that a friend had “liked” a brand, they were less likely to buy it than when they learnt that the friend genuinely liked it in the offline sense. In one field test, as summarised by the American Marketing Association, coupon redemption was 5.2% among people who didn’t see their friends’ Facebook likes and 3.7% among those who did. A click is a weak social signal, and people seem to sense that.
So what are likes good for then? Especially the consistent likes from same people show you who already likes your brand, and they make it cheaper to keep reaching people who already care and interact with your brand on some level.
I’ve had my own lesson in reading reach correctly. When one of my LinkedIn posts travelled far further than anything I’d posted before, the useful part came afterwards, in the post-mortem. What made it spread was structural: a specific scene at the start, an observation people didn’t expect, very concrete examples, the professional point at the end of the post, and no external links. My post had a whopping 160x the usual reach and nearly 10.5x times the amount of reactions I normally get on a good post. As a result I got easily over 100 connection requests (around 70% from our ideal customers) but none of them lead to direct client enquiries straight away. That result is still pretty good result for top of the funnel type of content.
That structure is repeatable, but whether the reach turns into business eventually depends on how good your funnel is and eventually what makes or breaks the sale is what people find when they click through to your page. If they don’t find what they came for, that’s a brand problem. Brand trust is built on consistency, and that what good social marketing essentially amplifies. But what good marketing can’t fix is clear messaging and consistent signals across all of your channels.
If you want to know what to measure instead of likes and engagement, Natalie’s breakdown of social media metrics and our piece on what branding is actually worth are good next reads.
Spotify’s Discover Weekly is another great example of product that gets shared naturally because it’s all about the user, not about the brand./ Image: Spotify
How does social proof work on social media?
When people are unsure what to think, they look at what others have done. On social platforms, likes, view counts, comments and reviews are that evidence, and they shape behaviour more than most of us would admit.
At UCLA, Lauren Sherman and colleagues put teenagers in an fMRI scanner and showed them Instagram-style photos. The same photo was shown with many likes to some participants and few likes to others. When a photo already had lots of likes, participants were more likely to like it themselves, and reward-related regions of their brains were more active. The same thing happened even for photos of risky behaviour like drinking and smoking.
A much larger study shows what this does to an entire market. In 2006, Matthew Salganik, Peter Dodds and Duncan Watts built an artificial music market in which 14,341 participants downloaded songs by unknown bands. Some could see how many times each song had been downloaded; others couldn’t. Showing the counts made popular songs more popular and made success far less predictable. Quality still mattered at the extremes (the best songs rarely flopped and the worst rarely won), but almost anything could happen in between.
If you combine those insights with the “liking” research, probably some bulb is lighting up in your mind. Social proof is excellent at attracting attention and more social proof, however, it’s a weak signal of quality, and a click from a stranger does very little to persuade anyone to spend money.
Substantive endorsement is what actually matters more, let’s talk about that briefly. In a classic study of online book reviews, economists Judith Chevalier and Dina Mayzlin found that reviews moved relative sales, and that a negative review hurt sales more than a positive review helped them. People read comments and reviews with far more care than the like count, and they give the negative ones extra weight.
So what can we learn from all of this? Design content that invites real comments, shares and saves, answer criticism publicly and well, and borrow credibility only from people your audience already trusts, which is exactly where influencer marketing works or fails. I go deeper into how trust forms in my article on consumer trust.
Why does consistency matter so much on social media?
As stated previously, repeated exposure builds familiarity, and familiarity builds preference. That only works if people can recognise they’ve seen you before.
In 1968, psychologist Robert Zajonc showed that repeated exposure alone was enough to make people rate made-up words, Chinese-like characters and photographs of faces more positively, with no other reason to prefer them. On social media, the feed runs this same experiment on your audience every day.
In my experience, one of the most expensive brand mistakes will cost you sales on the long-term. It’s getting bored of your own brand and changing colours, tone and messaging every few months. Because your audience never sees the same thing twice, so familiarity never gets the chance to build. Legacy brands refresh their look slowly and carefully for exactly this reason, and it’s very rare to see legacy brands to do a full rebrand (often leading to public backlash, like in Jaguar’s case).
The same logic applies to audiences. Millennials and Gen Z often get lumped together because they’re “both on social media”, yet they use platforms differently, and a late millennial and a young Gen Z buyer rarely respond to the same content. You can only be consistent for an audience you’ve actually defined, which is why psychographic segmentation and proper audience profiling are incredibly important during brand building.
Brand trust requires consistency, consistency builds familiarity and familiarity builds preference.
Why do people create content for brands?
People create brand content when it expresses who they are, or when it gives them genuine influence over the brand. That’s the “creating” level of the COBRA research, and it runs on identity and empowerment far more than on prizes.
This is also why some small, social-first brands grow faster than polished big ones. The founder shares the journey openly, asks for feedback, and invites people into real decisions like a new colourway or a product name. Audiences, and Gen Z in particular, want to feel like co-creators, and the brands that let them in end up with a community that promotes them without being asked. The psychology is the same as the IKEA effect: effort creates ownership, and people value what they helped make.
Few tips to encourage natural content creation (UGC) for your brand:
Only ask for input on decisions you’re willing to change: Fake consultation gets noticed (people do go back to comments to check and will call you out), and it damages trust faster than not asking at all.
Credit people properly and ask for consent before reposting: Someone’s photo of your product is still their photo.
Make creating easy: A clear prompt, a simple format and a reason to take part do more than a vague “tag us!”.
Where is the line between persuasion and manipulation on social media?
A tactic becomes manipulation when it only works if people don’t stop to think, or when it depends on something untrue. Fake scarcity, engagement bait and pressure to decide right now all sit on the wrong side of that line. Nobody should be pushed into a purchase inside a pressured five-minute window, before their brain has had time to weigh anything up. Some time sensitivity is fine, but a countdown timer that resets when you refresh the page isn’t.
Fear of missing out is real and especially strong on social platforms, where you’re shown what everyone else is doing all day. Genuine scarcity is fair: a limited run, a real deadline, capacity you actually have. (At Ainoa we cap how many clients we take on at once, and we say so because it’s true, we have a certain capacity per quarter due to our team size.) Manufactured scarcity is where brands get into trouble. One of our most read articles scarcity marketing and FOMO walks through brands on either side of that line.
Manipulative tactics always borrow short-term conversion against long-term trust, and on social media, where screenshots last forever, that debt gets collected in public.
How can brands use consumer behaviour insights in social media marketing?
Start from why your audience uses each platform, design content that serves that motive, and measure the behaviours that sit closest to buying. In practice:
Choose platforms by audience, not out of fear of missing out: The marketing myth I’d most like to retire is that you need to be everywhere. Do the positioning and audience work first, commit to the few platforms where your buyers actually spend time, get properly good there, and keep a minimal presence elsewhere.
Give people something to say about themselves: Before posting, ask what a follower would be saying about themselves if they shared it. If the honest answer is “nothing”, the post will be consumed at best.
Aim for high-arousal emotions you’re happy to be associated with: Awe, surprise, delight, even a little productive anxiety about a real problem your product solves. Leave outrage to others.
Weight substantive signals over applause: Comments with actual content, saves, shares, DMs and profile visits sit closer to intent than likes do.
Stay recognisable: Keep the same voice, visual system and core message for long enough that people start to recognise you without reading the name.
Pressure-test every tactic: If it only works when people don’t notice it, drop it. It’s not worth it.
Social media amplifies whatever your brand already is
Back to that 23:40 double-tap. The person enjoyed a post for a second, which is all a single post can reasonably ask for. The mistake happens later, in the meeting, when a signal of passing attention gets treated as evidence of preference.
Understanding social media consumer behaviour mostly comes down to keeping those two things apart. People scroll for entertainment and information, comment to connect, share to express who they are, and create when they feel ownership. None of that turns into sales if people can’t tell who your brand is for and why it’s worth choosing. Social media amplifies whatever your brand already is: a clear position gets multiplied, and so does confusion.
That’s why at Ainoa we start with the foundations (like a proper audit, then positioning, audience psychology and voice) before anyone even mentions a content calendar. If your social media is gaining traction but sales aren’t following, book a free 30-minute mini brand strategy audit and we’ll look at what’s really going on. You can also read more about how we work or explore our branding services.
Brand should look and feel consistent across all channels. Social media graphics for Chutney Castle.
FAQ
How does social media influence consumer behaviour?
Social media influences consumer behaviour most strongly at the attention and discovery stages. It shapes which brands people notice, what they assume others think of them, and which products feel familiar. How much of that turns into purchasing depends heavily on whether the brand itself is clear and trusted.
Why do people share content on social media?
People share to shape how others see them, to connect with people they care about, and because talking about themselves is intrinsically rewarding. Content that evokes high-arousal emotions such as awe, anger or anxiety is shared more often than content that makes people feel sad or calm.
Do social media likes lead to sales?
Not by themselves. Research with more than 14,000 participants, found that “liking” a brand on Facebook didn’t improve attitudes or purchasing, because the people who liked brands were already fond of them. Likes are useful as a signal of existing affinity and for reach, and much less useful as a measure of persuasion.
What psychological principles work best in social media marketing?
The most dependable are social proof, the mere exposure effect, identity expression and emotional arousal. They work best when they support a clear brand position and an audience you’ve properly defined, and they tend to backfire when your brand isn’t clear enough.
Is it ethical to use psychology in social media marketing?
Yes, when it helps people understand and choose honestly. It becomes manipulation when tactics rely on false information, manufactured scarcity or pressure that stops people thinking a decision through. Ethical use is usually the better commercial choice too, because trust lost on social media is lost in public.
