Internet Ad Revenue Reaches $31B In 2011, Mobile Up 149 Percent (IAB Report)

Internet ad revenue revenue grew 22 percent in 2011, to $31 billion, according to the IAB Internet Advertising Revenue Report. That's an all-time high.The final three months were also the all-time best quarter at $9 billion, an increase of 20 percent from the same quarter in 2010.

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