# Social proof

URL: https://idukki.io/glossary/social-proof
Category: UGC operations
Also called: peer evidence, crowd evidence

Social proof is the conversion lift a shopper takes from seeing other people validate a product. Reviews, photos, videos, "X people just bought this" and "Y customers rated this 4.7" are all social-proof formats.

The mechanism is Cialdini-classic and the magnitude on ecommerce PDPs is well-instrumented. PDPs with reviews see roughly 354% higher conversion than PDPs without (Bazaarvoice 2025 SEI). UGC photos amplify the effect by adding contextual demonstration on top of the trust signal.

## Related terms

- [UGC (user-generated content)](https://idukki.io/glossary/ugc)
- [Verified buyer](https://idukki.io/glossary/verified-buyer)

Authority reference: https://en.wikipedia.org/wiki/Social_proof