1. The document discusses various AWS services that can be used to build serverless applications including AWS Lambda, Amazon API Gateway, Amazon DynamoDB, Amazon S3, and Amazon Cognito. 2. It provides examples of how serverless applications can be built to handle web and mobile backends through code snippets and diagrams showing how different AWS services integrate together. 3. The document also references GitHub repositories containing sample code for building serverless applications using various frameworks and best practices.