These Five Companies Control 64% Of All Online Ad Spending

Interesting piece of data from digital marketing guy/VC Darren Herman: Just five companies control 64% of all online spending. (Incredibly, Google controls 46% of all online spending.)

One thing to note, says Herman: "With Facebook only now starting to monetize their platform, you can start to see how big an impact they could have on the dominance of the digital advertising landscape."

chart of the day, digital advertising, oct 2011