Google sitemap is for suggesting information to google regarding your website like page imporance and updated web pages.Do it right now and google spiders and robots will follow your suggestion
through google sitemap and it will be XML Format.

Once you have created the google sitemap file, place it on your server and then visit Google Sitemaps to submit your map.

Google site map can be generated by many online free tools.You can find the tool using the keyword “Google sitemap generator” in google search engine.

Once google sitemap XML file is created, upload to your server and then visit google site map address to submit.Google sitemap address can be found here
http://www.google.com/webmasters/sitemap

Login with your Google account and submit sitemap, before that you have to upload a google verification html page, genetated as a random number from google.

After next spider visit you can find google indexed new updated web page.

This facility is mainly helpful for shopping and online product sale website.

Orignal Author : Jagadeesh M