DataStream is a technology that allows for the continuous flow of data in real-time. It is commonly used in various applications, such as monitoring systems, financial transactions, and social media feeds. By processing data as it arrives, DataStream enables organizations to make timely decisions based on the most current information available. This technology often utilizes stream processing frameworks, which can handle large volumes of data efficiently. Popular tools for implementing DataStream include Apache Kafka and Apache Flink. These tools help businesses analyze trends, detect anomalies, and respond quickly to changing conditions in their environments.