If you would like to point a domain address that you have to some other domain address or subdomain, one of the ways to do this would be to use a CNAME record. By setting up such a record, the domain address being forwarded loses all of its records (A, MX, and so on) and instead, it takes the A record of the domain it is directed to. In this way, if you use a web design service by some provider that gives you a subdomain, you can use an actual domain and not only will it be directed to the site that you've created, but it'll also be displayed in the browser address bar at all times. Alternative possible uses of a CNAME record are to redirect all of the traffic from various subdomains to their main domain name, or to use the webmail service of your hosting provider by using webmail.your-doman.com, for example. The latter will work only by setting up a CNAME record for a subdomain due to the fact that this type of a record created for the main domain name renders it impossible to use email addresses.