Literally, the length of a spot. Most Radio spots time in at :60, TV spots at :30.

American Federation of Television and Radio Artists. A union for Radio and TV actors and voice actors.

An advertiser, also referred to as a client.

The person at the ad agency who serves as a liaison between the agency and the client.

Automated Dialogue Replacement in a film. A process where actors replace dialogue in a film or video.

A spontaneous spoken addition or alteration to a written script.

A person or group of people who represent talent and bring them into their facility to audition, or arrange for an actor to audition for casting directors and producers.

Also known as airtime, it's the media time slotted for a commercial, hence on the air.

A recorded portion of a radio program for demonstration purposes.

The continuous SFX behind voice-over suggesting the monologue or dialogue in a specific setting, like a hospital, restaurant, retail store, gas station, etc.