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