Explain in one sentence what social proof is

When unsure how to act , People imitate others , Look out for evidence to help them make decisions .

When sylfan - When Goldman invented the shopping cart , People don't want to use them , Because they look silly . So Goldman paid the actors , Let them use trolleys in his shop , Everyone soon followed .

Similar to Chinese idioms ： knowingly follow the example of a wrongdoer , But there is no meaning of praise or criticism , Objectively describe a phenomenon , Live online 、 Netizens and others take advantage of this phenomenon .

Meme meme It also belongs to this category .