Amazon SNS is a fully managed service from AWS, released back in 2010, facilitate A2P (Application-to-People) and A2A (Application-to-Application) communication. With this service in hand, you could scale your messages to your users, via SMS, mobile push, and even email using the A2P functionality of the Amazon SNS. If you are in search of a good AWS course, that helps you build concepts and gives you ample hands-on experience, I would recommend you check out the Intellipaat’s AWS certification course. Also, take a look at the AWS Interview Questions for Solutions Architect, if you are preparing for AWS Solutions Architect certification exam.