If you want to point a domain address that you have to another domain or subdomain, one way to do this would be to use a CNAME record. By creating such a record, the domain address being pointed loses all its records (A, MX, and so on) and instead, it takes the A record of the domain it is redirected to. In this way, if you are using a web design service by some provider that gives you a subdomain, you can use an actual domain name and not only will it be forwarded to the website that you've set up, but it will also appear in the Internet browser address bar at all times. Alternative possible uses of a CNAME record are to forward all of the visitors from various subdomains to their main domain name, or to use the webmail service of your hosting company by using webmail.your-doman.com, for example. The latter will work only by creating a CNAME record for a subdomain due to the fact that this type of a record created for the main domain address renders it impossible to use e-mail addresses.