If you want to direct a domain name that you have to another domain or subdomain, one of the ways to do this would be to use a CNAME record. By setting up such a record, the domain being pointed loses all its records (A, MX, and so forth) and instead, it takes the A record of the domain address it is redirected to. 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 pointed to the site that you have created, but it will also appear in the web browser address bar at all times. Alternative possible uses of a CNAME record are to forward all the visitors from various subdomains to their main domain, 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 because such a record created for the main domain renders it impossible to use email addresses.