Redux is a JavaScript library designed for predictable and maintainable global state management in applications. It assists developers in writing applications that behave consistently across different environments, client, server, and native, and are easy to test. By centralizing an application's state and logic, Redux enables powerful capabilities such as undo/redo functionality and state persistence. The Redux DevTools facilitate tracing when, where, why, and how an application's state changes, offering features like time-travel debugging and comprehensive error reporting. Redux is flexible and works with any UI layer, supported by a large ecosystem of add-ons to meet various development needs. The Redux team also provides additional libraries, including React-Redux, the official React bindings for Redux, and Redux Toolkit, an opinionated toolset for efficient Redux development.