Microsoft Azure Service Bus provides a hosted, secure, and widely available infrastructure for widespread communication, large-scale event distribution, naming, and service publishing. Endpoints can be located behind network address translation (NAT) boundaries, or bound to frequently-changing, dynamically-assigned IP addresses, or both. Service Bus comes with a 99.9% uptime SLA.
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With the introduction of Event Grid, Microsoft Azure now offers an even greater choice of messaging infrastructure options. The expanded messaging service fleet consists of the Service Bus message broker, the Event Hubs streaming platform, and the new Event Grid event distribution service. Those services, which are all focused on moving datagrams, are complemented by the Azure Relay that enables bi-directional, point-to-point network connection bridging.
Azure Service Bus is a raw messaging platform, there is no user interface to explore and visualize the features in action (apart from the basic interface provided by Azure Portal). Often times a simple property setting will have a huge functionality enabled, which otherwise would have required substantial engineering investment from end users.