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 website address which you type in a browser to access a site, while the hosting space is where your website data is going to be. These are 2 very closely related, yet separate services, even though many people believe that registering the domain is enough. Similar to the disk space and the monthly traffic features that a given hosting plan has, there are a certain number of registered domains that you can add as hosted i.e. 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 does not matter whether a domain is registered and hosted using the same company or is registered with one company and directed to another - either way your sites will function the very same way.