Once a sitemap is built, if this option is enabled, the updated version will be automatically submitted to the search engines specified. {$url} is replaced with your sitemap URL automatically. If this option is not enabled, search engines will only know about the sitemap if it is listed in robots.txt or if you manually submit it to them.<br />
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<strong>Note:</strong> Most search engines no longer support sitemap pings and this option should be considered to be deprecated.