I have uploaded my sitemap on server root folder. Do I need it submit it in Google Webmaster Tools?
Yes, if you have uploaded your XML sitemap to your document root folder then you still need to explicitly submit it in Google Webmaster Tools (GWT), or specify a
Simply uploading your sitemap to your server does not actually "submit it".
Alternatively, as mentioned, you can specify a
When your sitemap changes, you will need to resubmit (or inform Google) that your sitemap has changed. For more information, see Google's help page on submitting sitemaps.