Reverse ETL is crucial in today's data ecosystems because it enables businesses to transfer data from their data warehouses to other systems, making it simple for companies to activate the data they have gathered to provide better customer experiences, improve internal processes, and more. Reverse ETL is taking off due to its importance in providing real-time access to data, allowing companies to extract data from their data warehouses and make it available to other operational systems at the speed companies expect today. Unlike ELT, reverse ETL involves extracting data from a target system, transforming it, and making it available to other operational systems, primarily for operational purposes such as syncing data with customer-facing applications or partner systems.