In a nutshell
SQS (Simple Queue Service) is AWS’s queuing service that lets you send, store, and receive messages between your apps and AWS services. All messages are encrypted by default.
SQS lets you create two types of queues:
- Standard: processed at least once with best effort ordering.
- FIFO: processed just once and in order.
- You can configure a Lambda to be executed every time there’s a new message in SQS.