Let’s imagine you’re looking for JavaScript classes on Udemy. You open the Udemy app or website, input “JavaScript” into the search field, and a list of JavaScript courses appears. In a similar way, a REST API functions. You conduct a search and receive a list of results from the service you have requested.

An application programming interface (API) is a type of programming interface. It’s a collection of rules that allows programmers to communicate with one another. On the server, the developer creates the API and allows the client to communicate with it.
The API’s appearance is determined by REST. The term “Representational State Transfer” is an acronym for “Representational State Transfer.” It is a set of guidelines that developers must follow when creating an API.