Reverse ETL is a data process that flips the traditional ETL (Extract, Transform, Load) flow on its head. Instead of moving data from operational systems into a data warehouse, Reverse ETL extracts data from the warehouse and syncs it back into operational tools like CRMs, marketing platforms, and customer support systems. This enables teams to use the rich, centralized data from the warehouse in their day-to-day tools, making it easier to take action based on insights and improve customer experiences in real-time. It's becoming an essential part of the modern data stack, bridging the gap between data teams and business operations.

Check out this Open source Reverse ETL tool
https://github.com/Multiwoven/multiwoven