Stream processing is a data management approach that analyzes information as it arrives, enabling real-time insights and immediate actions in applications such as fraud detection, dynamic pricing, and AI-driven personalization. Unlike batch processing, which waits for data accumulation before analysis, stream processing handles continuous data flows by analyzing each event individually or in small windows, which is crucial for modern applications generating unbounded data streams. This method enhances app responsiveness by ensuring timely computation results and is suited for use cases where data's value diminishes quickly, such as financial transactions or sensor alerts. Stream processing involves complex state management, fault tolerance through checkpointing, and distributed execution across multiple machines to handle high event volumes and ensure consistency. Despite its complexity compared to batch processing, stream processing is essential for industries that rely on real-time data processing, such as financial services, large-scale log processing, and business analytics. Redis, with its Redis Streams feature, offers an integrated solution for stream processing, providing capabilities for message queuing, state storage, and fast data retrieval to support real-time applications efficiently.