In order to create a website, you need 2 things - a domain and a hosting plan for it. The domain registration is the actual web address that you enter in an Internet browser to reach a site, while the hosting space is where your site files will be. These are 2 very closely related, but independent services, although many people believe that registering the domain name is enough. Just like the disk space and the monthly traffic features that a given web hosting plan features, there are a certain number of registered domain names 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 using a different service provider. In technical terms, it doesn't matter whether a domain name is registered and hosted with the same company or is registered with one company and pointed to another one - in any case your websites will operate exactly the same way.