Event-driven pipelines are increasingly important for modern data workflows, as they allow immediate responses to external triggers such as new files in cloud storage or database updates. Prefect facilitates this process by offering event-driven scheduling, which enables flows to be triggered as soon as new data becomes available, eliminating the need for constant polling. This system uses events, structured notifications of specific occurrences, to initiate the relevant flows immediately, providing transparency and simplifying debugging by storing all event data for later review. For example, when a file is uploaded to a cloud bucket, Prefect can automatically trigger a flow to process the file and record the event, ensuring that all triggers are documented and easily traceable. This approach is essential for data pipelines that require real-time responsiveness and reliability, as it allows for precise tracking of why and when each flow was executed, enhancing the overall efficiency and auditability of the data processing system.