Dagster has introduced a comprehensive, free course titled "ETL with Dagster," consisting of seven lessons that guide participants through practical ETL implementation and architectural considerations, ranging from single-file ingestion to full-scale database replication. This course is part of Dagster University and highlights the use of Dagster for ETL processes, emphasizing its popularity in consolidating data sources. Participants will learn to leverage key Dagster features to enhance ETL pipeline maintainability and explore compatible libraries and frameworks to streamline ETL development. The course covers various ETL fundamentals, common ingestion patterns, and how Dagster components can simplify integrations, with the goal of making ETL processes efficient and less cumbersome. The course is open to all, allowing learners to progress at their own pace and engage with the Dagster community for support and further insights.