Four types of speeches are demonstrative, informative, persuasive and entertaining speeches. The category of informative speeches can be divided into speeches about objects, processes, events and concepts.
A demonstrative speech is intended to educate the audience. It often includes visual aids to add to the presentation and demonstrates how to do something. An informative speech is similar to a demonstrative speech, but does not include a demonstration.
A persuasive speech is intended to persuade an audience that the personal opinion expressed by the speaker is correct. An entertaining speech is a speech aimed at amusing people; entertaining speeches are often given at weddings or graduations.