Think of a REST API like a waiter in a restaurant. You (an app) tell the waiter what you want (your request), and the waiter goes to the kitchen (the server) to get it for you. REST is just a set of ...
I've come a long way over the years in terms of software development. There was a time when all I needed was an HTML form on the client-side and a Servlet's getRequestParameter() method on the server ...