Voice-over
Also called: commentary voice, narrator or narrator
A voice-over is a spoken text that accompanies images, usually on television. The voice-over can be a narrative voice that talks together off-screen the items of a TV program, the commentary voice for a film or documentary, or the narrator who conveys the message of an advertising commercial.
The term can refer to both the text being spoken and the voice actor. For the voice-over of commercials, well-known people are often chosen. Reasons for this are that the commercial attracts more attention and that the hired voice is trusted and appreciated by the target audience of the spot.