Reverse ETL tools such as Census and Hightouch are instrumental in transforming customer data from data warehouses into actionable insights for marketing, sales, and support applications, enabling enhanced customer communication through personalized notifications. These tools integrate seamlessly with platforms like Knock, allowing businesses to create rich notification experiences by defining user segments and triggering workflows based on specific behaviors or traits. While Census offers a user-friendly interface for marketers with features like Computed Columns, Hightouch caters to both marketers and data engineers with its extensive integration ecosystem and advanced data workflow controls. CDPs like Rudderstack and Segment also offer reverse ETL capabilities, positioning themselves as comprehensive data infrastructure platforms. Reverse ETL is particularly effective in scenarios such as powering ongoing product onboarding sequences, increasing feature adoption, and preventing customer churn by sending timely and relevant notifications that improve engagement and retention rates. By leveraging these tools, businesses can create data-driven notifications that significantly enhance product adoption and customer retention.