If you wish to make a web site, you need 2 things - a domain name and a web hosting plan for it. The domain registration is the actual website address that you type in a browser to reach a website, while the hosting space is where your website files will be. These are two tightly related, but independent services, although many people think that registering the domain name is enough. Just like the disk space and the monthly traffic features that a given website hosting plan offers, there are a certain number of registered domains that 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 through a different provider. In technical terms, it doesn't matter whether a domain name is registered and hosted using the same company or is registered with one company and directed to another one - in either case your sites will function the very same way.