You can read more about this technology at google sitemap site
Our free on-line crawler will extract up to 30 URL's from your web site.
You will need to generate and download sitemap.xml file locally and
upload to your web site root directory http://yoursite.com/sitemap.xml
After this is done, please login into google account and submit your
http://yoursite.com/sitemap.xml for processing and Google indexing.
Google sitemap FAQ | Google sitemaps home | XML sitemap generator bug reports and suggestions
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