AWS End User Messaging is a suite of services from Amazon Web Services (AWS) designed to enable developers to integrate scalable and reliable messaging capabilities directly into their applications for end-user communication. This includes various channels such as SMS, MMS, push notifications, WhatsApp, and voice messaging. It provides the infrastructure needed for use cases like sending time-sensitive alerts, one-time passwords (OTPs), promotional messages, and facilitating two-way conversations, offering global reach, high throughput, and tools for managing message delivery and user engagement while adhering to regulatory requirements.