If you want to register a domain name to make certain that no one else is going to take it, however, you haven't developed the site for it yet, you can park it. This is a service that registrar companies provide when a domain is not linked to any web or email hosting service. That way, you'll be able to protect a brand name, for example, and you'll own the domain in question even though it will not load any content. If you want, you may choose some standard template that the registrar offers, such as For Sale or Under Construction, or you can forward the domain to a different web address. Your second option is very helpful in case you own a number of domains, but you want all of them to open the same website. For example, you may register domain.net and domain.org, then park them and direct them to domain.com. In this example, you'll need hosting for the third domain name only and the traffic to the other ones is going to be redirected to it.