Net Online Ad Revenue Share By Company, 2011-2013 [TABLE]

Both Facebook and Google are now the top ad publishers not only for mobile, but for all digital as well—with an even stronger lead on the competition.

Across all devices, Google remains by far the No. 1 digital ad publisher in the world and will take in nearly 33% of all digital ad dollars worldwide this year, eMarketer estimates, up from 31.46% in 2012. Facebook will also increase its share of the total, to 5.41%, while Yahoo! will lose some ground. Microsoft’s share of the worldwide market will hold steady. Read the rest at eMaketer.