A parked Internet domain is one that's taken, but it's not associated with some other service - web or e-mail hosting. In other words, such a domain won't load any real content when you type it within a web browser, but no one can take it as you have already registered it and you are its owner. The best thing about acquiring a domain and parking it afterwards is that you will be able to keep it and not stress that someone else might register it meanwhile if, for example, the website for it is not ready yet. You are able to create a temporary Under Construction page for a parked domain while you are working on the website, or forward it to some other web address - temporarily or permanently. The latter option can be employed if you have already registered domain.com, for example, and you obtain domain.net and domain.org, in order to protect a brand name or a trademark. In this situation, the .net and .org domains can be parked and forwarded to the .com because you don't need individual sites for them.