It's communication engine which provides secure and reliable communication between components. It allows you to build applications and connect with different roles between Web and worker TL, you can use this for load labeling and or for decoupling where your web TS sent messages into a queue.
This article will cover the following.
Communication Mechanisms
Prerequisites
Implementation – Create a new Azure Service Bus
Steps to be followed.
Happy Learning!
The Developer’s Guide to Microsoft Azure - Second Edition