Google has begun testing "Listen Now" ad units, along with Spotify, Rhapsody and Apple's Beats Music, to simplify purchases. In the Listen Now ad unit, consumers can preview a song by clicking on
the button that appears in search results, which takes the listener to one of several music services. A Google spokesperson confirmed, "As always, the ads are ranked according to a variety of factors,
including bid, relevance, and click-through rate."
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