This AI tool, called ChatGPT Quiz by Ruby on Rails, is a platform that generates fun and informative quizzes for Ruby on Rails. It uses the ChatGPT model to generate questions and correct answers for the quizzes. Users can choose from a selection of games and play them once, with their results displayed at the end. Additionally, users can challenge their friends by inviting them to play a game after completing one themselves. The tool allows users to buy e-books related to Ruby on Rails and provides access to other users" quiz results. With its ability to generate quizzes and provide interactive gameplay, this tool can be used by Ruby on Rails enthusiasts to test their knowledge, learn new information, and compete with friends.