SNS and SQS - what a wonderful pair of services. They are very often used together to send messages between services or create a fan-out system. SNS is also a good companion to use with CloudWatch Alarms to send you an email at 2AM that the CPU of your EC2 instance is at 90% since 4 hours.
Source: [Dev.to](https://dev.to/aws-builders/sns-encryption-drives-me-insane-57l5)