A parked domain name is one that is taken, yet it is not associated with some other service - web or e-mail hosting. To put it differently, such a domain name won't open any real content if you type it in a web browser, but nobody can take it as you have already registered it and you are its owner. The advantage of acquiring a domain name and parking it afterwards is that you’re able to keep it and not stress that someone else may register it in the meantime if, for example, the website for it is not ready yet. You are able to set a short-term Under Construction page for a parked domain address while you are working on the site, or direct it to some other web address - temporarily or permanently. The latter option can be employed if you have already registered domain.com, for instance, and you obtain domain.net and domain.org, so that you can protect a brand name or a trademark. In cases like this, the .net and .org domain addresses can be parked and forwarded to the .com as you don't need different websites for them.