Correct answer - "SNS" : Amazon Simple Notification Service (SNS) is a highly available, durable,
secure, fully managed pub/sub messaging service that enables you to decouple microservices,
distributed systems, and serverless applications.
Incorrect:
"SQS" - This service polls messages, not push
"Kinesis" - It takes more work to create a solution with Kinesis
"Lambda" - Lambda can be used to create a pub/sub solution but SNS already does that good