With the World Wide Web all websites have a unique Domain Name or a URL "Uniform Resource Locator". These URLs are assigned a set of unique numbers called IP numbers or "Internet Protocol Numbers". All Web Servers use this individual I.P. address to identify and connect the Website to the end-users - You, the Internet surfer
While one cannot normally choose or change the I.P. Address of the Website. We can choose a Domain and the domain ending extension - "TLD"
For a simple example a domain name is our postal address and the TLDs could be called the zip code