If you wish to register a domain to make certain that no one else will take it, but you have not developed the web site for it yet, you may park it. It's a service that registrar companies offer when a domain address isn't connected to any web or e-mail hosting service. By doing this, you'll be able to protect a brand name, for instance, and you'll own the domain address in question even though it won't load any content. If you would like, you can choose some standard template that the registrar provides, like For Sale or Under Construction, you can also direct the domain to an alternative web address. Your second option is extremely helpful if you own a few domains, but you want each and every one of them to open the same site. For example, you can register domain.net and domain.org, then park them and forward them to domain.com. In this example, you will need hosting for the third domain address only and the traffic to the other ones is going to be redirected to it.