Message queue

 https://sharmarajdaksh.github.io/blog/the-what-why-and-how-of-message-queues

Messaging queues or brokers are components used for inter-process communication or for inter-microservice communication, whereby messages between multiple services are passed not through direct transfer of data, but through a common "queue" or buffer in the form of these messaging queues. The paradigm is similar to the publisher/subscriber model, whereby multiple publishers or "producers" push messages into "queues", and subscribers or "consumers" can listen for new messages coming into the queue. As the consumer "consumes" or picks up a message from the queue, the message is removed from the queue. The model is asynchronous in nature, such that the interaction of producers and consumers with the queue is completely independent of one another.