on Just Publishing Advice:
What is a domain name? It is by far the most important choice you are going to make for your website
When you decide to build a website or blog to promote your books, the first decision you will have to make is what domain name you are going to use.
Domain name registration is quick and inexpensive.
In most cases, your web hosting service provider is connected to domain name registrars, and you can choose top level domain names for less than $10.00 a year.
But before registering a domain, or even a free domain, you should do your homework first.