Step 3: Create an Amazon SNS Topic and Subscribe to It
Create an SNS topic using the Amazon SNS console. For instructions, see Create a Topic in the Amazon Simple Notification Service Developer Guide.
Subscribe to the topic. For this exercise, use email as the communication protocol. For instructions, see Subscribe to a Topic in the Amazon Simple Notification Service Developer Guide.
You use this Amazon SNS topic in the next step when you configure a CloudWatch alarm so that when AWS Lambda emits an error the alarm will publish a notification to this topic.