This is the second part of a two-part article on the leaked Google document "Google Guidelines for Quality Raters." In the first part we reviewed how Google raters are told to treat such things as relevance depending on the country of the query, and the actual rating scale. The document also revealed what raters consider “Useful Content” and showed us what it's like “Inside the Raters HUB.” In this part, we'll cover web spam guidelines.
"Webspam is the term for web pages that are designed by webmasters to trick search engine robots and direct traffic to their websites."
Google treats spam as the enemy, even if the "spam" page is considered relevant or useful to the search query. Google states: "It is possible for a page to receive a very high rating - even a Vital rating - and also be assigned a Spam label."
Once a page is identified as spam it goes to the "recycle bin." If you use deceptive search engine optimization techniques, read the web spam section of the document very carefully.
Google Optimization 
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