Redux is a predictable state container for JavaScript apps. In simple words, Redux makes it easy to manage your applications. So , It helps you manage your data and how your applications look. For small applications, managing the state of the Model-View architecture is easy.

   Actually, it is used . As the definition suggests, it is used to manage the state of the applications. when you use react with redux , it is a predictable state container for JavaScript applications.Therefore, It helps you write apps that behave consistently, run in different environments (client, server, and native), and are easy to test.

   It works on three basic principles,
       First, The state is read-only – The only way to change the state is to emit an action, an object describing what happened. This feature ensures that no events like network callbacks or views change the state. They can only express an intent to change the state.

Changes are made with pure functions – To specify how actions transform the state tree, you write pure reducers. The user can return new state objects, instead of mutating the previous state.

      Secondly, Single source of truth – The state of your whole application is stored in an object tree within a single-store. A single state tree also makes it easier to debug or inspect an application. It also enables you to persist your app’s state in development, for a faster development cycle.

For small applications, state management is easy. For larger applications with many state objects, it becomes tricky. To monitor this, Redux is integrated. JavaScript’s libraries like React use the Redux extensions to make the creation of applications easier.