If you want to create a website, you need two 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 data is going to be. These are 2 closely connected, but separate services, even though many people believe that registering the domain is enough. Much like the disk space and the monthly traffic features which a given website hosting plan provides, there are a certain number of registered domain names which you can include as hosted i.e. you can have the web content for them in some account even if the domains have been registered via a different firm. In technical terms, it doesn't matter whether a domain is registered and hosted with the exact same company or is registered with one company and pointed to another - in either case your sites will operate exactly the same way.