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3.10.12

Updated Specific Quality Webmaster Guidelines

Updated Webmaster Guidelines with more about the irrelevant keywords, rich snippets, monitoring site for hacking, removing hacked content, removing user generated spam.
Specific quality guidelines outline following techniques to avoid [ the updated and previous ].

updated 10/02/2012
updated 09/18/2012
Automatically generated content
Avoid hidden text or hidden links
Participating in link schemes
Don't use cloaking or sneaky redirects
Cloaking
Don't send automated queries to Google
Sneaky redirects
Don't load pages with irrelevant keywords
Hidden text or links
Don't create multiple pages, subdomains, or domains with substantially duplicate content
Doorway pages
Don't create pages with malicious behavior, such as phishing or installing viruses, trojans, or other badware
Scraped content
Avoid "doorway" pages created just for search engines, or other "cookie cutter" approaches such as affiliate programs with little or no original content
Participating in affiliate programs without adding sufficient value
If your site participates in an affiliate program, make sure that your site adds value. Provide unique and relevant content that gives users a reason to visit your site first
Loading pages with irrelevant keywords

Creating pages with malicious behavior, such as phishing or installing viruses, trojans, or other badware

Abusing rich snippets markup

Sending automated queries to Google

Engage in good practices like the following:

Monitoring your site for hacking and removing hacked content as soon as it appears

Preventing and removing user-generated spam on your site



from
http://support.google.com/webmasters/bin/answer.py?hl=en&answer=35769