A Sitemap is an XML file which contains a listing of all URLs within a merchant's store as well as the time the pages were last published. The file is used to inform and direct search engine crawlers so that web pages can be discovered and indexed more efficiently.
While a Sitemap does not change the method by which search engines that adhere to the sitemaps protocol (such as Google, MSN, and Yahoo) search and index web pages, it does provide them with additional information that might not otherwise be discovered, such as pages that are not linked from any other page within your store.
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