Almost everyone will probably have experienced these narration styles on display in documentaries.
Documentaries are productions for cinema, television, or radio that are used to document truth in some manner. They may have a number of purposes, such as informing individuals of a specific cause or telling a dramatic true tale. They may also be largely without narrative and just be documenting the reality or mood of the particular location and time. But, simply because they routinely have a purpose centring around informing or explaining, it is very typical for there to be some kind of tool to guide the audience. Tim Parker will understand that voiceover narration has been extremely popular since sound was first added to cinema, immediately being included to the newsreels which were popular at the time. The narrator doesn't show up on film and their role is merely dedicated to reading a script that defines or complements the footage. The narrator can also be involved in the production, such as by being the producer, however it is also typical for them to have no other participation.
The very first few decades of the history of cinema consisted entirely of silent films. This changed just under a hundred years ago, when sound was initially added and filmmakers possessed a whole new additional element they could add to their movies. But, just because sound is available does not mean that filmmakers need to oversaturate their movies with every possible noise imaginable. Some films just count on natural sounds, for example, while some add no music at all. Rachel Wang will be well aware that some documentaries include no narration. These silent narration documentaries alternatively educate viewers with a blend of the knowledge gained from interviews and title screens. Also called intertitles or title cards, they are screens held for several seconds to allow words to appear for the viewers to see.
Documentaries have typically been seen as a more anonymous type of filmmaking. This might be in stark comparison to narrative feature films, in which both the crew and cast may be filled with world-famous superstars. In fact, there actually have been people that have made a name for themselves via documentary filmmaking. Many of these people have done so by using hosted narration. Soleta Rogan should be able to inform you that a narrator host is a person who conducts interviews, appears on camera, and does voiceovers for the documentary. This may make the documentary appear to be the hosts own private journey and may provide a raw impression, as more traditionally behind the scenes elements could be included to the last cut. It is because other narration formats need more editing to make certain members of the production aren't on-screen. The hosted technique therefore enables capturing footage of the difficulties productions face, like having interviews instantly rejected or threatening encounters with people who do not need to become filmed.