Advertising tautology refers to the use of redundant or repetitive language in advertising in an attempt to emphasize a particular message or product. This often involves stating the same idea or information multiple times in different ways, without adding any new or meaningful content. It is a common tactic used by advertisers to create a sense of urgency or importance, but can often come across as insincere or manipulative to consumers. In essence, advertising tautology is a form of linguistic overkill that attempts to persuade through repetition rather than substance.