Lin Zhu; Staff Machine Learning Engineer | Eric Tam; Staff Software Engineer | Yuxiang Wang; Staff Machine Learning Engineer |Importance of NotificationsNotifications (e.g. email, push, in-app messages) play an important role in driving user retention. In our previous system, which operated on a daily budget allocation model, the system relied on predicting daily budgets for individual users on a daily basis, constraining the flexibility and responsiveness required for dynamic user engagement an...