Regarding radio

Radio advertising is a $20 billion business — and it has expanded both because listeners can now tune in on the Internet and because of the development of satellite radio (Sirius and XM subscriber-based programming). But it’s also competing with MP3 devices, which means there may be fewer listeners to any given radio station or program.
But if your business appeals to consumers who’re likely to subscribe to this type of programming, or if you can reach them on broadcast radio during drive time or particular radio programs (especially those with celebrity hosts), then you should consider this medium. Radio provides guidance on developing memorable radio spots, and Purchasing Ad Time on the Radio offers information on buying radio time to maximize your reach — and your budget.