There are 2 services that you’ll need for a functioning site - a domain and a website hosting plan for it. Each time you type the domain address in your Internet browser, you see the content that is uploaded within the hosting account, but if that domain is not linked to such an account or to an email service, it's parked. In other words, the domain name is registered and you are its owner, but it lacks content of its own. As a substitute, it can open either a pre-made “Under Construction / For Sale” page from the registrar company, or it can be forwarded to some other URL of your choice. The advantage of parking a domain name is that you can keep it and ensure that no one else is going to take it. Meanwhile, it won't block a slot for a hosted domain name in your account. You may also park domain names if you have a .com, for example, and you register domain addresses with other extensions like .net, .org or country-code ones to forward them to the main website in order to protect a brand name.