Marin Software has released “The State of Mobile Search Advertising.” It provides yet more evidence of how the search and paid-search markets are being profoundly affected by mobile devices. In almost every category there’s triple-digit growth according to the report, which projects that smartphones and tablets will combine to generate 25 percent of all Google’s paid search clicks in the US by the end of this year.

Marin also estimates that nearly one-quarter (23 percent) of “Google’s US paid-search spend [by December 2012] will come from mobile campaigns.” These are remarkable statements, and it means that Google will be seeing billions in mobile revenue accordingly.