Redux is a predictable state management library for JavaScript applications. It provides a single store that holds the entire application state, and the state can only be modified through actions processed by "reducers".

Example of Redux usage:

          {`import { createStore } from "redux";
          
          const initialState = { count: 0 };
          
          function reducer(state = initialState, action) {
            switch (action.type) {
              case "INCREMENT":
                return { count: state.count + 1 };
              case "DECREMENT":
                return { count: state.count - 1 };
              default:
                return state;
            }
          }
          
          const store = createStore(reducer);
          
          store.dispatch({ type: "INCREMENT" });
          console.log(store.getState()); // { count: 1 }`}