If you want to forward a domain that you have to some other domain address or subdomain, one way to do that would be to use a CNAME record. By setting up such a record, the domain address being redirected loses all its records (A, MX, and so on) and instead, it takes the A record of the domain name it's directed to. By doing this, if you use a web design service by some company that gives you a subdomain, you can use an actual domain name and not only will it be pointed to the website that you've created, but it will also appear in the web browser address bar at all times. Alternative possible uses of a CNAME record are to direct all 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 creating a CNAME record for a subdomain since such a record created for the main domain address renders it impossible to use email addresses.