Simple Notification Service (SNS)

Amazon Simple Notification Service (SNS) is a message delivery service provided by Amazon that delivers messages from a publisher to a subscriber. It uses the publish-subscribe model to deliver these messages. In this model, a publisher sends a message to a topic, which is then delivered to all of its subscriber endpoints. Since the publishers and subscribers don’t need to know about each other, Amazon SNS can be used to decouple the components of a distributed system and deliver messages between them.