If you want to register a domain name to make sure that no one else will take it, but you haven't created the website for it yet, you may park it. It's a feature that registrar companies provide whenever a domain address is not connected to any web or email hosting service. In this way, you can protect a brand name, for example, and you will own the domain name in question although it won't open any content. If you want, you may choose some standard template that the registrar provides, such as For Sale or Under Construction, you can also forward the domain name to an alternative web address. The second option is very helpful if you own a number of domains, but you want all of them to open the same website. As an illustration, you may register domain.net and domain.org, then park them and forward them to domain.com. In this example, you are going to need hosting for the third domain only and the traffic to the other ones will be redirected to it.