I've heard a lot about talking about MessageQueue, and I've never used it in practice. But before that, I would like to know what is the need and purpose of using an MQ. Thinking about scalability and performance.
Sometimes I get confused with caching, just like memcached and redis, where I can use Pub / SUb.
You can find a number of similar explanations and settings for your question depending on the platform you use.
In summary, it allows independent, potentially non-concurrent applications on a distributed system to communicate with each other.
If you want to do more in-depth research on the subject, with more technical and practical details about performance and performance, you can find the link below: link
I hope I have helped.
