What service is specifically designed to handle message delivery from publishers to subscribers?

The Amazon Simple Notification Service (Amazon SNS) is specifically designed to facilitate message delivery from publishers to subscribers in a decoupled and scalable manner. It enables the pub/sub messaging model where a publisher posts messages to a topic, and subscribers receive those messages instantly or are notified according to their preferences. This service is particularly beneficial for scenarios where messages need to be delivered to multiple subscribers simultaneously, such as alert notifications or updates, allowing for a versatile and effective communication strategy between different applications or services.

In contrast, other services fulfill different roles within the AWS ecosystem. For example, Amazon Simple Email Service focuses on email communication rather than the broader messaging framework, while Amazon SQS is designed for message queuing, allowing for asynchronous message processing between distributed application components. Amazon Kinesis specializes in real-time data streaming and analytics, not in direct message delivery to subscribers in the way that SNS does. This unique function of SNS in managing notifications and messages positions it as the correct answer for this question.