"The documentary genre is a more varied one than many people give it credit for. As a type of film, documentaries do usually aim to inform or educate about some kind of non-fiction story or topic, but that's not their sole purpose. Some aim to evoke certain feelings or experiences more than anything else, others aim to present an argument or point of view in a persuasive manner, and others are mostly concerned with simply entertaining audiences the way a work of fiction might. Furthermore, some documentaries aim to do a combination of the above, or maybe even none of the above, instead opting to do something else entirely.
Exploring the world of documentary filmmaking can be a truly eye-opening thing to do, and reveal worlds or unique perspectives that aren't as easy to explore through other genres. It's safe to assume that documentary movies will never go out of style, which makes keeping track of the best documentaries out there worthwhile."