If you have been hanging around Site-Reference for a while, you may remember my article last year about the leaked document, the 2011 Google Search Quality Handbook.
The handbook is a training manual for human raters who perform testing during the beginning stages of Google's algorithm changes. The raters' opinions are not used to directly influence rankings, but they are a guide to test improvements to the algorithms.
Since Google could never handle the magnitude of sites in its index, it employs these human raters via companies like Leapforce and Lionbridge, to assess the success of potential algorithm changes by rating the sites that are returned for varying search queries. If raters ascribe high marks, an algorithm change may stick.
The handbook was recently updated with 32 additional pages including a new section added called "Page Quality Rating Guidelines." SEO experts suggest the section was added post Panda and helps raters identify page quality easier.
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