Verify domain ownership
We verify that you own your domain — that’s your business web address, like yourcompany.com — to ensure that no one else is using your domain for Google Apps without your permission (to send email, for example). You need to verify your domain before you can start using Google for Work services.
Note: If you purchased a domain from one of our domain host partners when you signed up for your Google Apps account, you don't need to verify your domain. We already know that you own it.