1. Visit this page and sign in as Google Account (GMail)..if you don't have GMail sign up for that first..


2. Secondly, add blog using 'add a site' tab...

3. Thirdly, Google will ask you to verify your site then choose 'add meta tags'..

After that, copy the meta tags to (Layout->Edit HTML) and add meta tags after <head> click save the templates and click verity also in the Google Webmaster..and doNe!
For example as picture below..
