There are lots of ways to point a domain to an alternative domain or subdomain and one of them is by creating a CNAME record. If you own a domain name and you've developed a website through some online service which supplies you with a service subdomain, you could easily link the two by creating a CNAME record for your-domain.com that directs to subdomain.provider.com. What you'll achieve as a result is that www.your-domain.com will be in the web browser address bar while it opens the already mentioned website from the servers of the third-party provider. It is essential to know that if you create a CNAME record, any other records your domain may have will stop working, so you can't have both a CNAME record directing to one provider and functioning e-mail address with another one. The CNAME record is always an alpha string, not a number, and sometimes additional configuration may be required with the other company.