Producers put messages. Consumers poll on queue.

Only one of the consumers will successfully process a message

Advantages:

Scalability: Scale consumer instances under high load

Availability: Producer up even if a consumer is down

Reliability: Work is not lost due to insufficient resources

Decoupling: Make changes to consumers without effect on

producers worrying about them

Features:

Reliable, scalable, fully-managed message queuing service

High availability

Unlimited scaling

Auto scale to process billions of messages per day

Low cost (Pay for use)