Apache Airflow is an open-source platform for orchestrating and automating complex workflows and data pipelines. It allows defining tasks and dependencies programmatically using Python, enabling dynamic pipeline creation and scheduling. Airflow provides a powerful interface for monitoring, scheduling, and managing workflows, with built-in support for retries, logging, and alerts. It is widely used for ETL processes, data engineering, and machine learning pipelines, ensuring reliable execution of tasks across distributed environments.