This document discusses advanced event brokers, what they are, and when they should be used. It begins by describing the goals of early event brokers which focused on easy connections without libraries and using REST. It then discusses the additional capabilities of advanced event brokers, including resilience, monitoring, security, management, service discovery, and supporting multiple protocols. The document outlines how advanced event brokers can support hybrid cloud, IoT/digital transformation scenarios at massive scale. Key characteristics of advanced event brokers are described as smart routing/filtering, multi-protocol support, geographic awareness, security awareness, IoT optimization, and reliability. Examples use cases are provided such as connecting 10 million connected cars in real-time. In general, the document recommends using an