SNS stands for Simple Notification Service. It is a web service that provides highly scalable, cost-effective, and flexible capability to publish messages from an application and sends them to other applications. It is a way of sending messages.

For an AWS interview question about SNS (Simple Notification Service), the correct answer would be:

“SNS, or Simple Notification Service, is a fully managed pub/sub (publish/subscribe) messaging service provided by Amazon Web Services (AWS). It enables you to send messages or notifications to distributed systems or to various endpoints, such as email, SMS, HTTP endpoints, AWS Lambda functions, and more. SNS simplifies the process of sending notifications, alerts, or messages to a large number of subscribers or clients, making it an integral component for building scalable and decoupled architectures in cloud-based applications.”