The hosted domains feature of a hosting account denotes the amount of registered domains that you can add in the same account. Registering a domain name and hosting it are two different services although many people consider them to be the same thing. While the registration means you become the owner of a specific domain address, the hosting aspect is what actually permits you to have a website as this is where your data and emails are going to be. Because these are two different services, you are able to register a new domain with one company and host it with another by changing its name servers (DNS) - the domain name will work in the exact same way as if it was registered and hosted with the same company. It is also very important to know that changing the hosting means pointing the domain to a different company and not transferring it.