The Jamstack is a modern web development architecture that emphasizes performance, cost-efficiency, security, and a positive developer experience by eliminating server-side components and relying on pre-generated templated markup files accessed via a client-side JavaScript API. Gatsby, a static site generator utilizing React and GraphQL, and Netlify CMS, which provides an intuitive content management interface, are popular tools for building Jamstack applications. Gatsby efficiently loads JavaScript and CSS to minimize loading times and uses GraphQL to query data into React components. Netlify CMS stores content as Markdown files in a Git repository, which Gatsby uses to generate static web app files for deployment on platforms like Netlify, Now, or Amazon S3. The article provides a detailed walkthrough of building a fictional web app using Gatsby and Netlify CMS, covering aspects such as project setup, accessing Netlify CMS, and deploying the app to Netlify.