To use Google Apps, you need to verify your domain ownership with them. In order to do this, you need to create a CNAME record using the authentication token provided by Google.
Log into your cPanel. If you are unsure on how to do this, please view the following help article - 'How to log into cPanel
2 Under the 'Domains' title, click onto 'Simple DNS Zone Editor'.
3 Select your domain from the 'Domain:' list.
4 Under the 'Add an CNAME Record' heading, enter the authentication code provided by Google in the 'Name:' box.
5 Enter 'google.com' (or what you've been instructed to in Google Apps) in the 'CNAME:' box.
6 Click 'Add CNAME Record' button to complete.
7 You can now back into your Google Apps account and follow the prompt to 'Verify domain ownership'.
8 Choose 'Change your CNAME record' from the 'Verify your domain ownership' option.
9 Double check the information that you set as the CNAME record is correct and complete by pressing 'Verify'.