A parked Internet domain is one which is taken, but it's not connected to any other service - web or email hosting. Put simply, this kind of domain address won't open any actual content when you type it in a browser, but nobody can take it as you've already registered it and you are its owner. The advantage of acquiring a domain and parking it afterwards is the fact that you can keep it and not worry that someone else could possibly register it in the meantime if, for instance, the website for it is not ready yet. You may set a short-term Under Construction website page for a parked domain while you are working on your website, or forward it to some other web address - temporarily or permanently. The latter option can be used when you have already registered domain.com, for example, and you get 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 forwarded to the .com because you don't need separate sites for them.