The psychology is straightforward: when uncertain, people look to what others do. High follower counts, visible engagement, customer testimonials, ratings, press logos, and user-generated content all reduce the perceived risk of trying something new by showing that others already have. It is why a product with thousands of reviews converts better than an identical one with none.
For creators, social proof compounds: visible growth and engagement attract more growth and engagement. Brands surface it deliberately: featuring UGC, sharing testimonials, displaying ratings, and citing customer numbers. The most persuasive social proof is specific and credible: real reviews, real numbers, recognizable names.