Notification systems are crucial in modern applications as they enhance user engagement and experience. However, striking a balance between being engaging and not harassing users is essential. Low-code and no-code automation tools can help developers create tailored notification experiences without burdening engineers with complex logic implementation and maintenance. Key strategies for customizing user notifications include audience filters, dynamic channel routing, and workflows that adapt to the user's journey within the application. Automation is vital in managing notifications as it provides a more personalized experience and allows developers to focus on core product features. Courier is a notification service that centralizes all templates and messaging channels, increasing visibility and reducing engineering time.