Messaging systems use a broker to handle communications. These systems are designed to provide a communication buffer between distributed components, and they exchange information through messaging channels known as queues, encapsulating data in messages.

Messaging promotes the integration of many heterogeneous technologies through a communication bus that's completely agnostic to operating systems and programming languages. Let's imagine two applications: one written in Python and the other in Java. If both applications use Simple Queue Service (SQS), we can gain interoperability between platforms and work with string objects that can contain any kind of message structure; for example, XML or JSON.