Explore how to integrate Contentful, a flexible content management system, with Gatsby to build powerful websites in this 1 hour 23 minute tutorial. Learn to set up Gatsby, obtain API keys, create lessons, and leverage GraphQL queries. Discover how to add slugs, import data, create pages, and work with assets. Follow along with a live demonstration of building a Christmas card application, and gain insights into Contentful's pricing structure. Access the provided demo site and GitHub repository to enhance your understanding of this powerful web development combination.