:white_check_mark:OpenAPI is a specification that outlines how to describe a REST API interface.
:bookmark_tabs:An OpenAPI definition is a file, typically in YAML or JSON format, that describes what an API or service can do.
:checkered_flag:OpenAPI provides a standardized format for describing REST APIs, making it readable by humans and machines.
:bulb:Using an OpenAPI definition allows developers to quickly understand the functionality of a REST API without diving into the code.
:hammer_and_wrench:OpenAPI enables the use of various tooling, such as API validators, documentation generators, and SDK generators.