Final answer:
Swagger is an open source framework designed to help developers design, build, document, and test REST web services.
Step-by-step explanation:
Swagger is an open-source framework designed to help developers design, build, document, and test Representational State Transfer (REST) web services.
Swagger provides a set of tools that assist in creating REST APIs, including a user-friendly interface for developing and documenting APIs, generating client SDKs, and automatically generating interactive API documentation.
An example of Swagger in action is the Swagger UI, which allows developers to explore and interact with APIs by sending requests and viewing responses in a web browser.