Valid Meta Robot tag Content Values

Googlebot can interpret following robot ( META NAME="ROBOTS" CONTENT) values which can be added into the pages:

• NOINDEX - prevents any page from being included into search engine index.
  
• NOFOLLOW - prevents Googlebot to follow any links on that page.
  
• NOARCHIVE - prevents a cached copy of this page from being available in the search results.
  
• NOSNIPPET - prevents a description from appearing below the page in the search results, as well as prevents caching of the page.
  
• NOODP - blocks the Dmoz (Open Directory Project) description of the page from being used in the description that appears below the page in the search results.
• NONE - equivalent to "NOINDEX, NOFOLLOW".

To learn more about Web robots, please follow this link.