A parked domain name is one which is taken, however it's not linked to another service - web or e-mail hosting. In other words, this type of domain won't load any real content in case you type it inside a browser, but nobody else can take it as you have already registered it and you are its owner. The main advantage of obtaining a domain name and parking it afterwards is the fact that you’re able to keep it and not stress that someone else may register it in the meantime if, for instance, the website for it is not ready yet. You could set a temporary Under Construction website page for a parked domain while you are working on the site, or forward it to another web address - temporarily or permanently. The latter option can be used when you have already registered domain.com, for example, and you obtain domain.net and domain.org, so that you can protect a brand name or a trademark. In such a case, the .net and .org domain addresses can be parked and directed to the .com as you don't need separate websites for them.