Gatekeep is a platform that provides personalized learning videos, simplifying the study process for subjects such as mathematics through artificial intelligence technology. The product uses AI-driven videos to help users more quickly understand and master complex concepts. Its significance lies in the ability to deliver customized content based on the user's learning pace and style, thereby enhancing learning efficiency. The background information indicates that Gatekeep aims to optimize the learning experience through technological means, currently offering a web-based service. In terms of pricing, users can find more details by joining the Discord community or directly visiting the website.