Major search engines like Google, Yahoo and Mircosoft provide free tools for webmasters. Google webmaster tools help webmasters better control how Google interact with their websites and get useful information from Google about their site.
Using webmaster tools won't help your site get preferential treatment from the search engines - but what it does is help identify issues that, if fixed, added or corrected, will help your site perform better in search results.
Webmasters will be able to:
Yahoo (Yahoo! Site Explorer), Google and Microsoft (Bing Webmaster Tools) each offer free tools for webmasters. So, take advantage of them!!!