This document discusses how Tokopedia, an Indonesian e-commerce platform, improved user engagement and retention through cross-channel messaging. It highlights the challenges of high user churn in mobile apps. Tokopedia used behavioral targeting and automated journeys from MoEngage to engage new users across channels like push, email, and ads. This multi-channel onboarding approach boosted first purchases by 20%, reduced cart abandonment by 72%, and improved one-month retention by 60%, demonstrating the effectiveness of seamless cross-channel experiences.