The documentary is a non-fiction video (sometime docu-drama based on a mix of fiction and non-fiction storyline) where facts are presented in an audio-video format to the public. These include real people, places, and events. Documentaries are said to be a great source of knowledge where viewers are introduced to the lesser-known facts. This brings them close to reality.

Documentaries can be of two types – Voice Over and Narration. A good voice is the most important requirement of voice-over documentaries. It may be used either in the beginning or at the end or to describe a particular segment whereas narration is done throughout the documentary. It is expressive in nature where emotions are highlighted through voice. Hence, both require a good quality voice but the treatment makes a huge difference in the overall presentation of the documentary.