Enter a few words, separated by spaces, or just enter the domain you want.
It can be a good idea to register many different endings for your domain name, especially if you own a trademark for a certain name. As a UK business for example, you should definitely register your-name and yourname in both .com and .co.uk flavours.
This avoids the hassle of having to deal with "domain squatters"; an arduous and expensive process. You don't need a separate website for each domain, since you can point them all at the same place with our system.
