This article was focused on receiving messages rather than sending messages. The SNS is not a queue, think of it more as a router. It receives a payload and then immediately re-routes it to whomever is listening, whether it’s a texting or emailing system or a number of different Queues.

You just send the payload to the SNS address instead of the SQS address and it will reroute the message to all queues that are attached to the SNS address. Receiving messages is still done via the Queues, not the SNS

You can attach queues to the Notification service in the settings on AWS