OOOhhhh! It is always interesting to get your hands on one of these quality raters handbooks, from a PPC or SEO point of view……
Google Search Quality Rating Guidelines PDF
We have been tipped off of a revised Google Quality Rating Guidelines handbook that has been leaked. It has been over three and a half years since we last saw a leaked Google Quality Raters Handbook and that document was from back in April 2007. We have secured the March 30, 2011 version 3.18 of the Google Search Quality Rating Guidelines handbook used by Google Search Quality Raters around the world. To download the 125 page document click here and it will download the 2.3MB PDF document.
More about the 2011 google quality raters handbook at Search Engine Land :) (It would be impolite to link direct to the PDF)
UPDATE- Google forced SEL and others to remove the 2011 version of the quality raters handbook. While you can still get it (if you know what to search for) they don’t seem that concerned with the 2007 version – and there’s not a huge amount of difference.
If you search for using something like “filetype:pdf Google Guidelines for Quality Raters” in Google you’ll find the 2007 version – and maybe the 2011 guide. :)