A parked domain address is one which is taken, yet it is not linked to some other service - web or e mail hosting. Basically, this type of domain name won't open any real content in case you type it inside a web browser, but nobody can take it as you've already registered it and you are its owner. The main advantage of getting a domain and parking it afterwards is the fact that you can keep it and not stress that somebody else might register it meanwhile if, for example, the site for it is not ready yet. You are able to create a short-term Under Construction page for a parked domain name while you're working on the web site, or direct it to another web address - temporarily or permanently. The second option can be used if you have already registered domain.com, for instance, and you get domain.net and domain.org, so as to protect a brand name or a trademark. In cases like this, the .net and .org domain names can be parked and directed to the .com because you don't need different sites for them.