When would you use RabbitMQ?

You use rabbitmq when a user requests that your service does something that may take a significant amount of time.

Very generally, anything that takes more than 30 seconds should use a service like rabbbitmq. This may be processing files (e.g., video encoding, OCR), processing transactions (e.g., credit card payments, sending large emails), or processing human-to-human interactions (e.g., chat).

All rabbitmq does is provide an efficient way to store pending transactions & requests & forward them on to somewhere else that handles them.

It’s often a very backend process. Similar to a post-office distribution center. These distribution centers never talk to individual customers, they just take in mail, store them briefly, sort them, and send them off.

"RabbitMQ is a messaging broker that gives your applications a common platform to send and receive messages, and your messages a safe place to live until received."