Google Dance Tool - Compare www, www2, www3
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As a webmaster you might know that the search engine Google does an update mostly once a month. Several days before the updated database is available at www.google.com you can get a preview of the new data index at www2.google.com and www3.google.com. While that update period the search results vary from time to time so the update got the name Google Dance.
URL: http://www.stadtaus.com/en/php_scripts/google_dance_tool/
