What AWS service is designed specifically for application integration?

Amazon Simple Notification Service (SNS) is specifically designed for application integration by providing a fully managed messaging service focused on enabling message transfer between different components of an application. It facilitates the development of distributed systems by allowing messages to be sent from one service to another, ensuring that different parts of an application can communicate effectively.

SNS supports a variety of communication patterns, such as pub/sub messaging, which allows messages published to a topic to be delivered to multiple subscribers simultaneously. This service is particularly beneficial for decoupling application components, enabling scalable and reliable application architectures.

While other options like AWS Lambda and Amazon EC2 can also be involved in application integration at different levels, they are primarily compute services, not messaging services. Similarly, Amazon DynamoDB serves as a database service and doesn't focus on application-level messaging or communication integration. Therefore, Amazon SNS stands out as the most suitable service for application integration purposes.