Mobile will account for 85.9% of digital ad search dollars by 2018, reaching $28.41 billion, according to a new report from eMarketer. And Google's share will fall to 64.2% -- down from 82.8% in
2012. In 2013, Google's near-monopoly in mobile search shrunk nearly 15 percentage points, with standalone apps, such as Yelp, grabbing more search dollars.
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