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