What are message queues?

A message queue is like a special line where messages wait to be sent or received.

Imagine you're at a toy store and want to send a message to your friend, but they’re not there yet. Instead of waiting in the middle of the store, you leave your message on a little board by the door. When your friend arrives, they can pick up your message from the board. That board is like a message queue, it holds messages until someone is ready to read them.

Think of a message queue as a toy train track with little cars that carry notes. You write a note and put it on a car, which then rolls along the track to your friend's station. Your friend gets the note when their car arrives. Even if you're not there at the same time, the message still gets through.

Sometimes, messages need to be sent or received one after another, like sharing toys turn by turn. A message queue makes sure no message is lost or rushed, and everyone gets their turn nicely. It's like having a helpful friend who holds all your notes until it’s time to pass them on.