Terrestrial, satellite, or webcast? Broadcasts need to originate from somewhere.

If from an existing radio station, the program travels through the airchain to the listener. But what if you need to broadcast from a remote location OR if you don't already have a studio facility, OR if your show is in one market, and your guest happens to be in the Detroit area?

Broadcasters know what it takes to get the program to the home station, and then to the listening public.