If you want to direct a domain address that you have to another domain or subdomain, one of the ways to do this would be to use a CNAME record. By creating such a record, the domain being pointed loses all of its records (A, MX, etc) and instead, it takes the A record of the domain address it's redirected to. In this way, if you are using 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 forwarded to the site which you have created, but it will also be displayed in the web browser address bar at all times. Alternative possible uses of a CNAME record are to direct all of the targeted traffic from various subdomains to their main Internet domain, or to use the webmail service of your webhosting company by using webmail.your-doman.com, for example. The latter will work only by setting up a CNAME record for a subdomain because this type of a record set up for the main domain address renders it impossible to use e-mail addresses.