At the end of our journey in the world of RabbitMQ, we took a deep dive into the RabbitMQ components and discussed several key features such as Erlang behaviors and process supervisors that lay the basis of the message broker. We discussed what happens during the boot process of the message broker and how RabbitMQ interacts with the outside world with the Mnesia database. Alongside, we briefly covered the additional features that are provided by the RabbitMQ server. At the end of chapter, we also discussed how to write plugins for RabbitMQ.