What is the use of the following Meta Tag?

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• C.Rebecca 500 Post Club

  August 2011

  noodp: This directive is only supported by Google, Yahoo and Bing and prevents the alternative description from the ODP/DMOZ from being displayed in the search results.
  
  noydir: This directive is only supported by Yahoo and prevents the alternative description from the Yahoo Directory from being displayed in the search results.

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• KanchanTMG Registered Users

  August 2011

  sisatel wrote: »

  Somebody is using the following meta tag -
  meta name="robots" content="noodp, noydir"What is the use of the tag? Is is mandatory?
  
  What are NOODP & NODIR?

  
  noodp: No open directory project this means that Search engines will not pick descriptions from dmoz.org for any of page.
  Noydir: no ydir means that meta tags should not be picked from yahoo directory by any search engine.

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• Manual Registered Users

  August 2011

  Meta tags are critical, don't under estimate them.

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• g2one network Registered Users

  August 2011

  meta tag is a show by the your website fully description.......

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