This tutorial guides users in creating a custom plugin for Strapi, a headless CMS, using OpenAI's text generation capabilities. The user creates a new Strapi project and sets up a custom field called "text-ai" that uses OpenAI to generate content based on a prompt input by the user. The generated text is then stored in the database and can be displayed in the admin panel or used in other parts of the application. To authenticate the API calls, the plugin uses an OpenAI API token stored in the Strapi configuration file. The tutorial also covers setting up a custom route to access the OpenAI service and handling errors that may occur during the generation process.