Online radio offers the same product as traditional radio except that the emphasis is on quality over quantity. With the popularity of smart phones, most users will subscribe or listen to some form online radio. Some of the more popular streaming services include Spotify and iHeart Radio. These platforms give users the ability to listen to the music/program whenever they want.
When you advertise on Online Radio you take away the calculation and you rely on the same real time bidding model as digital advertising. Impressions are purchased on a CPM basis and are served as non skippable ads based on the targeting you select.