http://www.google.com/insidesearch/howsearchworks/assets/searchqualityevaluatorguidelines.pdf
General Guidelines November 12, 2015
Proprietary and Confidential – Copyright 2015
http://www.google.com/insidesearch/howsearchworks/assets/searchqualityevaluatorguidelines.pdf
Source : Official Google Webmaster Central Blog: Updating Our Search Quality Rating Guidelines
