Drew Hilles, national director of audio for Google, points out that some of the company's radio ads won't be sold online but rather via a direct sales force focused on "relationship-based sales" with big clients, just as the company does already with some of its online ad sales.

FORBES

Google's "Audio Ads" platform, an extension of AdWords, automates the process considerably, giving customers with an easy way to designate the time, station format, geographic market and demographic audience they are trying to reach and providing them with an "ad creation marketplace" where they can collect bids from ad specialists who can work with them to create their radio spots.

FORBES

After coming up short with its attempts at an online audio library with Google Music in 2011, the Larry Page-led company does not want to fall behind again in the musical arms race.

FORBES: Google Continues To Play Catch-Up With 'All Access' Music Service As Critics Sound Off