The second option is to Register a New Domain. There is a cost associated with this as you're registering your own domain name like www.example.com. The third option is Use a Domain You Already Own. If you've previously purchased a domain with Weebly, and are not using it with another site currently, you can enter it here. You can also use this option if you bought a domain through another registrar and want to use it with your Weebly site.