This paragraph summarizes the key points of the text, focusing on the essential user requirements for both developers and non-technical users of a notification system. Understanding these users' personas is crucial before building a notification system to ensure a better user experience. The developer's perspective emphasizes scalability, reliability, abstracted channels, good documentation, intuitive APIs, analytics, support for integrated logging, test environments, white labeling, and role-based access control. In contrast, non-technical users require a smooth user interface, usability, designing notifications, historical records, RBAC, and analytics to effectively use the system. To meet these requirements, the notification system should be designed to scale reliably while providing a seamless experience for both technical and non-technical users.