Redux

The Redux store is the main, central bucket which stores all the states of an application. It should be considered and maintained as a single source of truth for the state of the application.

If the store is provided to the App.js (by wrapping the App component within the <Provider> </Provider> tag) as shown in the code snippet below, then all its children (children components of App.js) can also access the state of the application from the store. This makes it act as a global state.