An SDK, or Software Development Kit, is a set of software tools and libraries provided by a platform or software developer to aid other developers in building applications for that platform.
SDKs typically consist of APIs (Application Programming Interfaces), sample code libraries, and development frameworks to streamline the app development process and give access to specific features and functionalities of the platform ecosystem. Developers use SDKs to access features and functionalities provided by the platform while simultaneously creating applications that integrate smoothly within its ecosystem.