Marketers seem to forget about the old reliable medium of radio because of the exciting other advances that are occuring. But many exciting advances are happening in radio. Innovations such as Apple Radio, Spotify, and Pandoria are changing radio in a major way. Radio is the most widely used medium in America and the world. This is ripe for marketers to use targeted ads to their audience.

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Why Marketers Need to Reevaluate Radio, the World’s Most Popular Medium – AdAge.com