What is a Domain Name and type of extensions?

Hello guys Domain Name Maybe a thousand of the question in your mind. what is a domain name and type of extensions? How to buy it? A Domain is the first step of the website. A Domain is a help to create a new website. Some people buy the domain by his/her name and other people can buy some other bases. A domain name is an important role in the website. Moreover, nowadays Domain can be easy...