React’s default data flow requires passing props down and lifting state up through component trees, creating complex and confusing data management in larger applications. This approach becomes unwieldy and performance-intensive as apps grow.
Redux introduces a centralized store where all application data lives. Components subscribe to the store for data and dispatch actions to request changes, eliminating the need for complex prop passing and state lifting patterns.
The Redux pattern provides predictable data flow: components subscribe to store data, dispatch actions to request changes, and the store updates data based on these actions, triggering component re-renders when subscribed data changes.