When should you think about using message queues?

hey everyone, ive been thinking a lot about async processing lately. weve got a few services that could def benefit from decoupling, like order processing and email notifs. it feels like message queues (kafka, rabbitmq, sqs, etc) are the go-to solution for this. but beyond the obvious async wins, what are the other signals that tell you its time to introduce a message queue into your architecture? are there specific types of failures or scaling challenges that message queues uniquely address? curious to hear your experiences and thoughts on the tipping point