The Data Distribution Service (DDS) is a middleware protocol designed for real-time data exchange between applications. It enables efficient communication by allowing data to be shared in a publish-subscribe model, where data producers (publishers) send information to data consumers (subscribers) without needing to know each other's identities. This approach enhances scalability and flexibility in distributed systems. DDS is widely used in various industries, including automotive, aerospace, and healthcare, where timely and reliable data sharing is crucial. It supports quality of service (QoS) settings, allowing developers to customize data delivery based on specific application needs, such as reliability and latency.