Documentaries can take various forms and serve different purposes. They aim to both document information to inform audiences as well as entertain them. There are six main types of documentaries: docudrama, which reenacts real events; fly on the wall, which observes without participants' awareness; mixed, combining elements like interviews; fully narrated, using voiceover; docusoap, following people's lives; and self-reflexive, acknowledging the filmmaking process. Examples are provided for each type.