If you wish to create a website, you need two things - a domain name and a hosting plan for it. The domain registration is the actual website address which you enter in a browser to access a site, while the hosting space is where your site data will be. These are 2 tightly related, yet independent services, even though many people assume that registering the domain name is enough. Very similar to the disk space and the monthly traffic features that a given website hosting plan provides, there are a certain number of registered domain names you can include as hosted which means that you can have the web content for them in some account even if the domains are actually registered through a different company. 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 directed to another - in either case your sites will function exactly the same way.