REST stands for Representational State Transfer. REST is simply a way for different services to communicate and exchange data. The core of the REST architecture consists of a client and a server. The server listens for incoming messages, then replies to it, whereas the client starts the connection, then sends messages to the server.
In the modern web programming world, RESTful web applications use the HTTP protocol for communication. The RESTful client would be an HTTP client, and the RESTful server would be the HTTP server. The HTTP protocol is the key application layer communication protocol that powers the internet, which is why RESTful applications can also be called web applications. The communication layer of the RESTful applications is often simply referred as RESTful APIs.
REST APIs allow applications developed in various types of platforms to communicate. This includes other microservices in your application that run on other operating systems, as well as client applications...