AWS SNS helps you send e-mail, SMS, and mobile push notifications very efficiently. The subscribers of the messages receive the messages over one of the supported protocols such as HTTP/S, SMS, e-mail, and Amazon SQS.

If you are targeting an HTTP(S) endpoint from SNS, then it is highly recommended that your HTTP(S) application be highly available to avoid message drops. For reliable messaging, you can store the notification messages to Amazon SQS.

Mobile push notifications are typically used for application alerts, push e-mails and SMS, and mobile push notifications. A use case for mobile push notifications could be to prompt your inactive users back to using your application again. Targeting mobile platforms for mobile notifications requires integration with different libraries for different platforms. AWS SNS provides a single interface for all these platforms. You send a single push message to SNS, and then SNS sends this message to different platforms...