Mobile Share of Digital Ad Spend to Rise Sharply
Search advertising is tipped to see the quickest shift to mobile. By 2017, eMarketer predicts, the mobile share of search advertising expenditure could reach 60 percent or $15.2 billion. Given these numbers, Google’s decision to develop a mobile operating system and give it away for free makes a lot of sense. After all, Android has helped Google to seamlessly carry its dominant position to the mobile marketplace as well.

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Digital advertising expenditure in the United States is predicted to reach $61 billion by 2017, as ad spending gradually shifts to mobile devices.