* [[http://googlewebmastercentral.blogspot.com/2007/09/improve-snippets-with-meta-description.html|meta description]]
  * [[http://googlewebmastercentral.blogspot.com/2009/09/google-does-not-use-keywords-meta-tag.html|Google не учитывает meta keywords]]
  * http://sites.google.com/site/webmasterhelpforum/ru/stati/rukovodstvo-po-poiskovoj-optimizacii-dla-nacinausih-ot-google
  * http://www.seomoz.org/blog/visitor-social-network-login-status-google-analytics