In order to use Google Webmaster tools for your website, you need to verify it with Google to prove that you own the website.
There are two ways to do this:
- Uploading a special file to your website
- Adding a Meta Tag to your website.
As a search engine prowls your site, it gathers information from the title, headings, content, and Meta Tags such as description or keywords. It compares the words within each of these sections and “ranks” the site dependent upon how well the information matches. We have more information on how to maximize your meta tag references below.
You can follow to the actions proven by Don Campbell in below video and add meta tag to header.php in your file.