The article guides readers through building a temperature converter application using Next.js, Tailwind CSS, and Strapi headless CMS. It starts with setting up a Strapi project to manage the backend, where a collection type for temperature conversions is created with fields such as "from," "to," "multiplier," and "offset." The guide then explains the creation of a Next.js app with Tailwind CSS for the frontend, detailing the process of setting up a development server and coding the temperature conversion functionalities. The app uses helper functions to fetch and convert temperature data from the Strapi backend. The finished application serves as a demonstration of using these technologies together and offers potential for further expansion into other types of conversion applications.