There are four main types of speeches according to purpose: informative speeches provide understanding of a concept or idea; persuasive speeches seek to influence the audience; entertainment speeches aim to amuse, such as comedian performances; informative speeches share information, like a teacher giving a lecture. Additionally, there are four types according to delivery: extemporaneous speeches involve limited preparation time; impromptu speeches have no preparation; manuscript speeches involve reading from a written guide; and memorized speeches recite memorized content word for word.