You can use the following links to learn more about the details of Sitemaps, the statistics and diagnostics available using the Google Webmaster tools, and an overview of Sitemaps:

Sitemap Resources

• Sitemaps Protocol
• Sitemaps FAQs

Google Webmaster Resources

• Google Sitemap Help Overview
• Google Webmaster console statistics and diagnostics
• Google Sitemap Discussion Group

Further Sitemap Resources

• Google Sitemaps Review on SEO Chat
• Wikipedia article on Google Sitemap