5e SRD:Persuasion Skill

Persuasion. When you attempt to influence someone or a group of people with tact, social graces, or good nature, the GM might ask you to make a  check. Typically, you use persuasion when acting in good faith, to foster friendships, make cordial requests, or exhibit proper etiquette. Examples of persuading others include convincing a chamberlain to let your party see the king, negotiating peace between warring tribes, or inspiring a crowd of townsfolk.