Microsoft Azure Stream Analytics is a real-time data processing service that enables users to analyze and process streaming data from various sources, such as IoT devices, social media, and applications. It allows businesses to gain insights and make decisions quickly by processing data as it arrives, rather than waiting for batch processing. The service supports SQL-like query language, making it accessible for users familiar with SQL. It can integrate seamlessly with other Azure services, such as Azure Event Hubs and Azure Functions, to create comprehensive data solutions. This flexibility helps organizations respond to events and trends in real time.