I'm a developer working at Toss who prepared this lecture together on the topic of Airflow, which can be called the flower of batch processing. While the service called Airflow is often quite unfamiliar to many people, as services grow larger, workflow services like this become extremely useful. This is because it's the service that's given top priority when handling large-scale batch processing. Even if you're in an environment where you don't need to learn Airflow yet, the various perspectives and concepts taught in this lecture will definitely help you in your development and study environment. I don't think this is a lecture that simply teaches only Airflow. I ask for your great interest and hope you'll look forward to the next lecture as well. Thank you!!