RabbitMQ is a message broker. If you think of how a broker of any kind works, then it would be easy for you to understand the working of RabbitMQ too. Say you are consulting a property broker, so you become the person who is initiating a request to purchase property. Let's name you Producer-a guy who is producing a request.
Broker is a guy who has a list of properties that have been listed by other people. Let's name one of those people Consumer of your producer's request. Eventually, Producer is going to buy the property of Consumer.
Broker has lists of properties; let's name the listing Property queue. So, Producer wants some property; it adds the request to Broker. Broker looks over his listing and tries to match the correct consumer.
That's exactly how RabbitMQ works. Except that there is no commission charge and there is no property!
RabbitMQ exchanges messages between a producer and a consumer using the message queue. There can be multiple producers...