URI stands for Uniform Resource Identifier. It is a string of
characters designed for exact identification of resources
and extensibility by the URI scheme. 
The purpose of a URI is to locate a resource(s) on the server hosting 
of the web service.

A URI’s format is :////.

A URL is the most common type of (URI). URLs are essential to navigating the 
internet.RLs consist of multiple parts -- including a protocol and domain name 
that tell a web browser how and where to retrieve a resource.