Middleware in Redux is a type of software that provides a way to interact with actions that have been dispatched before they reach the reducer. It’s primarily used for logging, crash reporting, performing asynchronous tasks, or anything else that should happen before or after an action is dispatched. Middleware in Redux can be seen as a middleman between dispatched actions and reducers. It also provides a centralized place to handle system-wide concerns such as logging, error reporting, or API calls in Redux.