Good question. A few months ago Google launched this project in BETA. Is that you prepare a site map in XML format and you give it to Google. What is the use? According to Google used to collect information on the structure of your website. You can assign the URLs, the refresh rate and the importance of each. How it works Google provides you with a script written in python to download and configure to generate a site map. You get a file with examples of various configurations. Among them you can designate a path to collect all the files, specify the URLs directly read your server logs to find urls among some other things. When finalizing the sitemap you have to enter your Google account in Google Sitemaps page, sitemap and send the confirmation to a file on your server. When Google has gone through your sitemap will give you the OK. Does that mean that the Google bot has gone through my page and have included my URLs in your system? No. There is no guarantee that they do not even. Maybe, maybe not. For yes, it usually takes a few days. Doing a Google sitemap and submit improve my ranking in the SERPS? No. Not affected at all. Nor will affect the regular procedure for reviewing your site google regularly with their bots. It is something apart. It is still new and not known to what extent aid, however it is worth doing because it can help Google find all your URL's, especially if you have a lot of content is more dynamic and deeply embedded in the structure of your page. What happens if I have or I can use python on my server? There have been many programs and to manage the Web map with other technologies. You can also do by hand with notepad.
Thanks for sharing all these question -answer rounds that often come to our mind literally. Keep sharing more about these google sitemaps,updates etc