The tutorial explains how to create a desktop quiz application using Next.js and Strapi, a headless CMS that allows content management through RESTful or GraphQL APIs. Strapi is fully customizable and JavaScript-based, enabling developers to focus on building applications without backend concerns. The guide walks through setting up a Strapi application using a quiz template, creating content types, and exposing a public API endpoint to access quizzes. It further details building a desktop application using Nextron, a framework for creating Next.js-based desktop apps, and incorporating TailwindCSS for styling. The process includes creating a home page to display quizzes, setting up dynamic routing for individual quizzes, and implementing state management to track user progress and scores. The application allows navigation between quiz questions and displays the user's score upon completion, with suggestions for future enhancements like result persistence and user management.