A producer (component 1) sends message A to a queue, and the message is distributed across the Amazon SQS servers redundantly.

When a consumer (component 2) is ready to process messages, it consumes messages from the queue, and message A is returned. While message A is being processed, it remains in the queue and isn’t returned to subsequent receive requests for the duration of the visibility timeout.

The consumer (component 2) deletes message A from the queue to prevent the message from being received and processed again when the visibility timeout expires.