OpenAPI Specification

OpenAPI Specification (OAS) is a way to describe an API in a language that's easy for people to understand. It's like a code protocol that computers use to talk to each other about the way an API works. Think of OAS like a set of instructions (like a recipe) that tells the computer what to do. OAS makes it easier for developers to create, document, and implement APIs, as well as allowing multiple applications to integrate with each other.