What is a domain name? A domain name is the location of your website on the Internet. Your domain name will be what you become known by online so it's important to get it right.
Each website on the Internet is labelled with something called an IP address which is the actual address of the website online. A typical IP address looks like this: 188.8.131.52. Remembering a string of numbers like that is difficult so a domain name translates all those numbers into something like www.amazon.com. This is far easier to remember.
#1 Dot what?