There are various ways to redirect a domain to an alternative domain or subdomain and one of them is by setting up a CNAME record. When you own a domain name and you've developed a website using some online service which provides 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 are going to achieve in this way is that www.your-domain.com will be in the browser address bar while it opens the already mentioned website 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 name may have will stop functioning, so you can't have both a CNAME record pointing to one company and working e-mail address with a different one. The CNAME record is always an alpha string, not a number, and frequently further configuration may be required with the other company.