In order to make a website, you need 2 things - a domain and a website 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 is going to be. These are 2 tightly connected, but individual services, although many people believe that registering the domain name is enough. Much like the disk space and the monthly traffic features which a given hosting plan has, there are a certain number of registered domain names that you can add as hosted i.e. you can have the web content for them in some account even if the domains are actually registered via a different service provider. In technical terms, it doesn't matter whether a domain is registered and hosted with the same company or is registered with one company and pointed to another one - in either case your websites will operate the very same way.