Jamie is analyzing an advertisement that suggests people will impress their friends by wearing a certain brand of clothing. What persuasive technique is being used?

The persuasive technique is appealing to credibility or character in a form of a status upgrade of the wearer. If the advertisement suggests that your friend will get impressed by wearing this certain clothing brand, it implies that you have a nice taste and you have such appealing prestige to your friends and get their approval from it.