In order to make a web site, you need 2 things - a domain and a website hosting plan for it. The domain registration is the actual web address which you type in a web browser to reach a website, while the hosting space is where your website data is going to be. These are two tightly related, yet separate services, while many people assume that registering the domain name is enough. Just like the disk space and the monthly traffic features that a given web hosting plan provides, 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 service provider. In technical terms, it does not matter if a domain is registered and hosted with the exact same company or is registered with one company and pointed to another - in any case your websites will function in exactly the same way.