In order to create a web site, you need 2 things - a domain name and a website hosting plan for it. The domain registration is the actual web address which you type in a web browser to access a website, while the hosting space is where your website data will be. These are 2 closely connected, but individual services, although many people assume that registering the domain is enough. Just like the disk space and the monthly traffic features that a given web hosting plan offers, there are a certain number of registered domains which you can add as hosted which means that you can have the web content for them in some account even if the domains are actually registered using a different company. In technical terms, it doesn't matter if a domain is registered and hosted with the same company or is registered with one company and directed to another - in any case your websites will function the very same way.