A parked Internet domain is one that's taken, but it is not linked to any other service - web or email hosting. Basically, this type of domain name will not open any real content if you type it inside a browser, but no one can take it as you've already registered it and you are its owner. The benefit of getting a domain name and parking it afterwards is the fact that you will be able to keep it and not stress that someone else may register it meanwhile if, for example, the website for it is not ready yet. You can create a short-term Under Construction webpage for a parked domain while you are working on the site, 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 instance, and you acquire 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 because you do not need separate websites for them.