In order to verify your website, you must go to the list of websites in the publishers menu. The websites that need verification will have a green button saying Verify Ownership. Click this button and you will be given two options to verify your website.
Option 1: Verify the website by adding a meta-tag to your HTML code.
Option 2: Verify the website by adding a document named prVerify.txt with the metatag inside and upload it to the root of your website.
If you are unable to verify your website using these options, please create a ticket and explain why and we'll do our best to help you!