A parked Internet domain is one that is taken, however it's not linked to some other service - web or email hosting. To put it differently, such a domain will not load any actual content when you type it within a web browser, but nobody else can take it as you've already registered it and you are its owner. The main advantage of 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 in the meantime if, for example, the website for it is not ready yet. You may create a temporary Under Construction page for a parked Internet domain while you are working on the site, or forward it to another web address - temporarily or permanently. The latter option can be employed if you have already registered domain.com, for instance, and you get domain.net and domain.org, in order to 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 do not need individual websites for them.