There are several ways to point a domain address to a different domain or subdomain and one of them is by setting up a CNAME record. In case you own a domain and you have developed a site using some online service which provides you with a service subdomain, you can easily link the two by setting up a CNAME record for your-domain.com that directs to subdomain.provider.com. What you will achieve with this is that www.your-domain.com is going to be in the browser address bar while it opens the already mentioned site from the servers of the third-party company. It is essential to know that if you create a CNAME record, any other records your domain address may have will stop working, so you can't have both a CNAME record directing to one company and working e-mail address with another one. The CNAME record is always an alpha string, not a number, and sometimes more configuration may be necessary with the other company.