There are now literally hundereds of new Internet Domain names available. This web site is using one of them, .kiwi rather than the more familiar .com or .co.nz
The new names relate to trades, regions, special interest groups, professions and so forth.
What does this mean for you? Basically you can have a web site and an email address that reflects your identity as as being is short and memorable. The days of being something @xtra.co.nz should be long gone.
Sound hard? Not really, there are lots of good registrars who will help you and if that sounds too hard go to the big daddy, Google.
The company reponsible for the Internet names, ICANN, has a web page on the subject here.