If you'd like to register a domain to make certain that no one else will take it, but you have not created the website for it yet, you can park it. This is a feature that registrar companies provide when a domain is not connected to any web or e mail hosting service. By doing this, you are able to protect a brand name, for example, and you'll own the domain name in question even though it will not open any content. If you wish, you can pick some default template that the registrar offers, like For Sale or Under Construction, or you can forward the domain name to a new web address. Your second option is very helpful if you own a few domain names, but you want each and every one of them to open the same site. For instance, you may 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 name only and the traffic to the other ones is going to be redirected to it.