Social Proof
From Ladder Wiki
Social Proof is a termed coined by Robert Cialdini in his book Influence: Science and Practice. It refers to the idea that when people need to make a decision, they often take cues from other people to quickly decide rather than thinking through the decision on their own.
As a seduction term, social proof describes when a person looks good or of high quality, thanks to the reactions, reputations, and acclamations of the surrounding people. It can be anything as obvious as a rock star looking attractive simply because he is famous and has a crowd around him, or as subtle a friend admitting that he looks up to an average guy friend of his for some reason. Anything where the surrounding people demonstrate in some way that you are worth being close to is giving you social proof.
