Message processing refers to the handling and management of messages or data packets within a system, network, or application, involving tasks such as receiving, decoding, transforming, and delivering data to its intended destination. As a fundamental aspect of distributed systems, microservices architecture, and real-time data integration, message processing is crucial for ensuring reliable, efficient, and scalable communication between different components, services, or systems, making it a key consideration for developers and architects designing modern software applications and infrastructure.