Money is pouring into mobile advertising—$5.3 billion last year, according to the IAB.
Those ads were served across 6 billion mobile devices. That's less than $1 per device, per year—a tiny sum. That tells you how far mobile advertising has to go, and how massive it will become in the next five years.
InMobi runs one of the largest mobile ad networks. It claims to serve 93.4 billion impressions in 165 countries. The following slides break down the size of the mobile ad audience globally, in the U.S., in Europe and in the U.K.
InMobi also breaks down those impressions by operating system (iAd, Android, etc.), by manufacturer (Apple, Samsung, HTC, etc.) and by device (iPhone, iPad, Samsung Galaxy, etc.).
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