Middleware in Redux is like a pipeline between dispatching an action and the moment it reaches the reducer.

When an action is dispatched:

• It first passes through the middleware.
• Middleware can intercept, modify, log, delay, or even cancel actions.
• After the middleware processing, the action proceeds to the reducer.

Example:

• Logging Middleware: Logs every action before it reaches the reducer.
• Thunk Middleware: Allows dispatching functions for async behavior.

Basic middleware example:

const logger = store => next => action => {
  console.log('Dispatching:', action);
  let result = next(action);
  console.log('Next State:', store.getState());
  return result;
};

Middleware adds powerful customization and side-effect handling capabilities to Redux.

---