This document outlines how to use AWS Lambda to label images uploaded to an S3 bucket using Amazon Rekognition. It involves: 1) Creating an IAM role to allow Lambda access to S3, CloudWatch, and Rekognition; 2) Creating an SNS topic to receive notifications; 3) Creating a Lambda function using either a template or sample code to label images; 4) Assigning the IAM role to the Lambda function; 5) Configuring the S3 bucket to trigger the Lambda function on uploads; and 6) Uploading an image to test the notification.