Glossary term
What is MQ (Message Queue)?
MQ stands for Message Queue.
Holds messages until workers process them. Example: Order placed → email job in the queue.
Learn it properly · System DesignLesson 18: Message Queues: A Gentle IntroductionPlacing an order shouldn't wait on the email provider — or fail because SMS is down. How message queues let you do the essential work now and everything else reliably a moment later, with acks, retries, dead-letter queues and back pressure.