Here is a video from the techlead for Google Webmaster Tools how to use GWT like a SEO: http://www.youtube.com/watch?v=tQQmq9X5lQw
Here are help articles by Google, just go through them once you will surely get some help, http://support.google.com/webmasters/?hl=en
webmasters tool will help you to know about problems of site and you can also submit the sitemap of yours that will help your page to become easily exist in google
First add your site and verify that you are indeed the owner or at least have access to managing it. Once logged into Google Webmaster Tools you will have access to three primary areas for review - site configuration (managing your website), your site on the web (how Google sees you), and diagnostics (where Google is getting stuck).
1. Create a Google Account. You can start by creating a Gmail account. 2. Go to Google Webmaster Tools. 3. Click on ADD a Site. Simply Click the Add a Site Button and type in your URL. It should be your domain name, including the http:// – Therefore, for this example, I typed in: http://....com 4. Add the code. Simply add the code provided by Google. You should copy and paste this to the HEADER as intructed. You should log-in to your website editor, and right after the HEAD, before the BODY, you should paste it. After doing that, simply click on VERIFY. 5. And you are DONE! That’s it! Were you able to follow? As you can see, as I was setting up my site with Google’s Webmaster Tool, I created this Tutorial for you, so that when you are about to do this by yourself, you will be able follow this Step-by-Step Tutorial. Now, what is this for? I have encircled the areas that you need to look at.
Google web master tool use the maintained the sites i.e content, urls, vedio, java script ect, then you can not understood properly so you can search the video for the google web master it's easy available in Google or other search engine.
Its a great tool to analyze your site backlinks and other significant data to get an idea that how to work for it with the statistics shown by the search engines.!! Placing the Google verification code will work for the sites..!!
Google Webmaster Tools is useful to find out where your links are found, as well as geotargetting where you want your site to be
Create a Google webmaster account, after that get log in. Add your website in to webmaster after that verify your website. Google webmaster helps to show the error, malware, Duplicate title and description of your site.