What is REST & how web api is Rest

Question

How to define Rest with example for each points.

 

one rest principal is not clear to me that is Uniform Interface

 

what is  Uniform Interface and how to explain this points.

 

how to explain that web api is restful architecture.

i read this article https://blogs.msdn.microsoft.com/martinkearn/2015/01/05/introduction-to-rest-and-net-web-api/

 

thanks