There are two separate services you'll need for a working site - a domain plus a website hosting plan for it. Each time you type the domain in your browser, you see the content that’s uploaded in the website hosting account, but if that domain isn't linked to such an account or to an e-mail service, it's parked. Put simply, the domain is registered and you're its owner, but it doesn't have any content of its own. Instead, it can open either a pre-made “Under Construction / For Sale” webpage from the registrar company, or it may be forwarded to some other URL of your choice. The main benefit of parking a domain is that you can keep it and make sure that no one else is going to take it. In the meantime, it will not occupy a slot for a hosted Internet domain inside your account. You may 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 website as a way to protect a brand name.