There are two services that you need for a functioning web site - a domain name and a web hosting plan for it. If you type the domain address in your Internet browser, you see the content that’s uploaded within the website hosting account, but if that domain name is not linked to such an account or to an email service, it is parked. In other words, the Internet domain is registered and you're its owner, but it lacks content of its own. As a substitute, it can open either a pre-made “Under Construction / For Sale” Internet page from the registrar company, or it can be forwarded to any other URL of your choice. The main advantage of parking a domain address is that you can keep it and make sure that nobody else is going to take it. Meanwhile, it's not going to block a slot for a hosted domain in your account. You can also park domains if you have a .com, for example, and you register domain names 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.