What Is A Domain Name?

A domain name is a case-insensitive string of letters, numbers, and hyphens that is used to define the location of a website. Domain names are used as pointers to IP addresses. Domain names are typically arranged hierarchically,

For example in my main domain name:

Home

The following URL is to a Page:
http://drskd.com/how-does-it-work/

The following URL is to a Category
http://drskd.com/blog/topics/affiliate-marketing/

The following URL is to a Post:
http://drskd.com/blog/topics/website/what-is-a-website/