If you wish to direct a domain that you have to some other domain or subdomain, one of the ways to do this would be to use a CNAME record. By creating such a record, the domain address being redirected loses all its records (A, MX, etc) and instead, it takes the A record of the domain address it is forwarded 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 and not only will it be pointed to the website which you have set up, but it will also appear in the browser address bar at all times. Some other possible uses of a CNAME record are to redirect all the visitors from different subdomains to their main domain, or to use the webmail service of your hosting company by using webmail.your-doman.com, for instance. The latter will work only by setting up a CNAME record for a subdomain simply because such a record set up for the main domain name renders it impossible to use e-mail addresses.