In order to make a web site, you need two things - a domain name and a web hosting plan for it. The domain registration is the actual website address which you enter in a browser to reach a site, while the hosting space is where your site data is going to be. These are two very closely related, but separate services, although many people assume 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 domains which you can add as hosted i.e. you can have the web content for them in some account even when the domains have been registered via a different firm. In technical terms, it doesn't matter whether a domain is registered and hosted using the same company or is registered with one company and pointed to a different one - either way your websites will operate the very same way.