Cheap: Radio advertising is relatively cheap compared to print or television advertising, Production costs are lower. You also have to pay less for advertising time to reach the same number of people as you would with a TV or print ad.
The destination: radio advertising allows you to target your specific audience. Some Radio stations are after the widest possible audience, but many point to niche markets, such as adolescents, sports fans, news junkies, political conservatives, university students, educated people, or fans of any kind of music.
Portability: Radio is the only mass medium that people use while driving, clean the house or mow the lawn. TV advertising requires people to sit in front of their TV, print ads and web requires focused attention on the page or screen. But you can listen to the radio while doing other things.