Click Fraud on Google Less Than 1%

While interviewing Shuman Ghosemajumder of Google today, Andy Beal was able to expose the fact that the undetected click fraud rate on Google AdWords is less then 2%.

Ghosemajumder showed proof to backup his numbers and then later clarified that those figures included "invalid clicks" so he claims the true undetected click fraud percentage was more than likely a fraction of 1%.

I wonder. I see a lot of "click quality adjusment" credits in my account on a monthly basis. If they are catching this much click fraud, I doubt the stuff they miss is such a small fraction.