Social proof

Social proof is the tendency to look at what other people do when we're not sure what to do ourselves. On a website, it is everything that shows a visitor that others already chose you: reviews, ratings, client logos, testimonials and user numbers.

The term was popularised by psychologist Robert Cialdini in his 1984 book Influence, as one of the principles of persuasion.

Why it matters for a first impression

A visitor who has never heard of you has little to go on. Proof that others trusted you, and were happy, gives them a reason to believe you too. That is why social proof is one of the strongest trust signals, especially for a new or small business.

Common forms

• Reviews and ratings, preferably from an independent platform that visitors recognise
• Client or partner logos that your audience knows
• Testimonials with a name, a photo and a concrete result
• Numbers, such as customers served or projects completed
• Mentions in the press or in sources your audience trusts

Make it believable

Social proof only works when visitors believe it. Vague praise without a name ("Great service!") or numbers that seem too round do little. Specific, verifiable proof does more. And never make it up: fake reviews damage trust once discovered, and in the EU, posting fake consumer reviews or misrepresenting reviews is a banned commercial practice (Directive 2019/2161).

On StayOrBounce, the question Do I trust it? shows whether your social proof is visible and convincing enough on the first screen.