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AdSense and AdWords under the hood

Posted July 5, 2006 by acroterion in Pay-Per-Click

This is a message I have received today from Google:


Thank you for your email.We understand that you wish to receive specific information regarding the invalid clicks we observed on your account. However, due to the proprietary nature of our algorithm, we cannot disclose any details about how our monitoring technology works or what specifics we found on your account.If, in the future, you suspect that invalid clicks may have resulted from a visitor to your site, we suggest that you review your site’s logs for any suspicious activity and notify us with your findings. This information can help us in resolving any issues, although as outlined in our Terms and Conditions (, Google will use its sole discretion when determining instances of invalid clicks.Sincerely,The Google AdSense Team

Today we’ll disclose some of the AdSense and AdWords algorithm facts. The best way to describe such a complex system is by using graphs. No more words, there you go:

AdSense and AdWords Diagram - Click here to download full diagram [PDF 2.08 MB]

Click here to download full diagram [PDF 2.08 MB]

About the Author


I am Elchanan Rotstain, the CEO of Acroterion since 2001, after twenty years of academic research and direct work experience with search engines and software architecture methodologies. I known to the world as "The Search Engine Doctor", and am internationally known expert and author of a voluminous University thesis about searching methodologies, later used by the first search engine frameworks. Presently doing research with Ph.Ds at University of Alberta, University of Michigan and The Department of Mathematics at Bar-Ilan University.


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