Knock provides a set of APIs and a dashboard for developers to introduce transactional notifications into their products efficiently, emphasizing the importance of observability in maintaining a robust notification system. A failure in notifications can lead to missed opportunities and customer churn, making observability crucial as it helps identify and rectify errors, ensuring smooth communication between a product and its users. Observability in notifications involves using logs, traces, and metrics to diagnose and address issues, allowing engineering teams to understand and improve system performance actively. By using tools that output these observability pillars, developers can pinpoint anomalies and optimize service delivery, while also empowering customer service teams with valuable insights to better assist users. Metrics derived from observability not only assist in troubleshooting but also provide actionable insights into user preferences and behaviors, helping to tailor notification strategies for improved engagement. Knock's solution integrates observability features like debugging capabilities, webhooks, and real-time metrics streaming, offering developers comprehensive tools to enhance their notification systems' reliability and effectiveness.