Amazon SNS
Simple Notification Service — a managed publish/subscribe messaging and notification service.
Amazon Simple Notification Service is a fully managed pub/sub messaging service that delivers messages from a publisher to multiple subscribers simultaneously through a topic. Subscribers can receive messages via HTTP/HTTPS endpoints, email, SMS, mobile push notifications, or other AWS services such as Lambda and SQS.
The key exam distinction is the delivery model: SNS fans out a single message to all subscribed endpoints at once (push-based, one-to-many), while SQS holds messages in a queue until a single consumer polls and retrieves them (pull-based, one-to-one). A common architecture combines both — SNS fans out to multiple SQS queues so different consumers each get their own copy to process independently.
PlayPrepHQ study notes are written and reviewed against primary exam sources. How we create & review content →