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Re:A Beginner’s Guide to Pay-Per-Click: Quality Score by rfergie on Wednesday May 25, 2011 @01:38PM (#2584804)
This is a pretty good resource for someone who just wants to know the basics.

In my opinion the best high level resource for quality score information is http://www.clickequations.com/blog/

The guy who writes there also has a book coming out http://www.highresolutionppc.com/books/quality-score-in-high...

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