When subscribers register themselves to receive messages from a publisher, the 1:N fan-out pattern of messaging ensures that any message sent by a publisher, reaches all subscribers that have registered. NATS provides an additional feature named "queue", which allows subscribers to register themselves as part of a queue. Subscribers that are part of a queue, form the "queue group".| docs.nats.io
NATS is a system for publishing and listening for messages on named communication channels we call Subjects. Fundamentally, NATS is an interest-based messaging system, where the listener has to subscribe to a subset of subjects.| docs.nats.io
