To utilize most Google webmaster features, you are required to Verify your site ownership. To do this, login to your Google webmaster tools account.
1. Click "Add a Site"
2. Enter the URL of a site you'd like to manage.
3. Click [Continue] and you will be taken to the Verification page.
4. On the Verify Ownership page, click Alternate Methods > Upload an HTML file to your server. Download the file (Do not change the name).
5. Enter the Admin View of your site and upload the HTML verification file from Control Panel > Site Properties > Special Features > Site Static Files.
After adding the file to your site, click on the Verify button in the Google Verification window and the verification procedure will be completed.