voice over recording microphone voice over for television, radio commericials, advertisiments, and spots
As a Commercial Device
The commercial use of voice-over in advertising has been popular since the beginning of radio broadcasting.

In the early years, before effective sound recording and mixing, announcements were produced "live" and at-once in a studio with the entire cast, crew and, usually, orchestra. A corporate sponsor hired a producer, who hired writers and voice actors to perform comedy or drama.

The industry expanded very rapidly with the advent of television in the 1950s and the age of highly produced serial radio shows ended. The ability to record high-quality sound on magnetic tape also created opportunities, as has the proliferation of home computers capable of recording, often using inexpensive (even free) software and a microphone of reasonable quality.

Manufacturers will often use a distinctive voice to help them with brand messaging. Often retaining talent to a long term exclusive contract.