The tutorial details the process of deploying a REST API using AWS Cloud Development Kit (CDK) with AWS Lambda-based authorizers, emphasizing the advantages of using AWS CDK as an infrastructure-as-code (IaC) tool. It guides users through setting up necessary tools and accounts, including NodeJS, AWS CLI, AWS CDK CLI, and CircleCI, and demonstrates how to create a new AWS CDK project in TypeScript. The article explains how to define AWS Lambda functions for business logic and authorization, integrate them with API Gateway, and customize API behavior with usage plans and rate limits. It also covers creating CDK constructs for AWS services like S3, DynamoDB, and API Gateway, and concludes by walking through automating the deployment process using CircleCI, including setting up environment variables and triggering pipelines. The tutorial aims to show the seamless integration of AWS services using familiar programming languages, enabling efficient development and deployment of cloud-based applications.