A parked Internet domain is one that is taken, yet it is not connected to some other service - web or email hosting. To put it differently, this kind of domain name won't load any actual content when you type it in a browser, but no one else can take it as you've already registered it and you are its owner. The advantage of acquiring a domain name and parking it afterwards is the fact that you’ll be able to keep it and not worry that someone else could possibly register it meanwhile if, for instance, the site for it is not ready yet. You can set a short-term Under Construction webpage for a parked domain while you're working on your site, or forward it to some other web address - temporarily or permanently. The second option can be used if you have already registered domain.com, for instance, and you acquire domain.net and domain.org, in order to protect a brand name or a trademark. In cases like this, the .net and .org domains can be parked and forwarded to the .com since you don't need different websites for them.