When you have a lot of domains with different extensions and you would like all of them to open precisely the same Internet site, you can have the Internet site under one of them and redirect all the rest. There are various approaches to forward one Internet domain name to another, including the so-called domain parking. When your hosting plan allows it, though, it'll be better if you host all the domains and create a URL redirect, not a domain redirect. The real difference between the two is that while a domain address is hosted, you could still have content for it, create subdomains, e mail addresses, etc., while with a parked domain it's not possible to do any of those things. As an example, if you are building localized sites under various country-code domain names, you will be able to work on them, but in the meantime, people shall be redirected to the main Internet site.