How to Use Your Own Domain Name
To use your own domain name, you will use either a “masking” or a “forwarding” service from the company you registered your domain through. This allows you to mask the domain shown in the URL with your own domain or allows you to use a forwarding service for your own email account making it look like a custom domain email address.
The domain’s registrar will usually have instructions to do this. Since each company is different, you will need to utilize their instructions.