There are 2 services you'll need for a functioning website - a domain name and a web hosting plan for it. Each time you type the domain name in your Internet browser, you see the content that is uploaded in the website hosting account, but if that domain name is not linked to such an account or to an e-mail service, it's parked. Put simply, the domain address is registered and you are its owner, but it doesn't have any content of its own. Instead, it can open either a pre-made “Under Construction / For Sale” Internet page from the registrar company, or it can be forwarded to some other URL of your choice. The advantage of parking a domain is that you can keep it and be sure that nobody else will take it. At the same time, it's not going to block a slot for a hosted domain name inside your account. In addition, you can park domain names if you have a .com, for instance, and you register domain addresses with other extensions like .net, .org or country-code ones to forward them to the main web site in order to protect a brand name.