The document discusses the various purposes that a documentary can serve, including to inform audiences, provide factual information to educate viewers, entertain audiences to maintain their interest, educate people on a subject, persuade viewers by manipulating their opinions on a topic, raise awareness of issues that may not be widely known, provide multiple perspectives objectively, and investigate topics through a balanced argument. The main purpose of the documentary being planned by the author is to entertain audiences to maintain their interest, as well as to educate and raise awareness of the topic factually.