What’s Amazon SNS?
Per the company, Amazon Simple Notification Service (SNS) is a notification system, providing low costs for the mass delivery of alerts or messages. Amazon SNS is a sure way to send notifications based on a topic, specifically to mobile users, SMS and email.
In Amazon SNS, there are two types of clients—publishers and subscribers—also referred to as producers and consumers.
Publishers: Send messages to a mass quantity of subscribers
Subscribers: Recipients of messages, who only receive messages from relevant categories or topics. They “subscribe” to message type