Have you ever done something because you saw other people doing it? You probably have, and you don’t even know it. That is a psychological phenomenon called social proof. Social proof is a concept wherein people follow the actions of the masses. It is based on the idea of normative social influence. People are more likely to do something if they see somebody else doing the same thing, or they want to be similar to or liked by certain people. We believe something is correct behavior if a lot of other people do it.