If you wish to create a website, you need two things - a domain and a hosting plan for it. The domain registration is the actual website address that you type in a browser to access a site, while the hosting space is where your site files will be. These are 2 very closely related, yet individual services, although many people believe that registering the domain is enough. Similar to the disk space and the monthly traffic features which a given web hosting plan offers, there are a certain number of registered domain names you can include as hosted i.e. you can have the web content for them in some account even if the domains are in fact registered via a different company. In technical terms, it doesn't matter if a domain name is registered and hosted with the same company or is registered with one company and directed to a different one - either way your websites will operate exactly the same way.