The Atlas Stream Processing is a new offering from MongoDB that simplifies the path to reactive, responsive, and event-driven applications. It helps developers migrate more quickly to event-driven applications by providing a managed streaming data processing service based on the model of documents, unifying the experience of working with all types of data in a single platform. The Atlas Stream Processing offers three key resources: continuous processing, continuous validation, and continuous merging, which enable developers to transform their streaming data into rich and differentiated customer experiences. It also provides a managed service for building stream processors, dead letter queues, and visualizations, making it easy to create a stream processor in just a few lines of code.