There are two separate services you'll need for a working website - a domain plus a hosting plan for it. Each time you type the domain name in your web browser, you see the content that’s uploaded within the hosting account, but if that domain name isn't linked to such an account or to an email service, it's parked. Put simply, the domain address is registered and you're its owner, but it doesn't have any content of its own. As a substitute, it can open either a pre-made “Under Construction / For Sale” webpage from the registrar company, or it can be forwarded to any other URL of your choice. The main advantage of parking a domain name is that you can keep it and make sure that no one else is going to take it. At the same time, it won't occupy a slot for a hosted Internet domain inside your account. You could also park domain names if you have a .com, for example, and you register domain names with other extensions such as .net, .org or country-code ones to forward them to the main site as a way to protect a brand name.