MyGPT is an AI tool that enhances the capabilities of ChatGPT, a chatbot. It offers advanced features like ChatGPT plugins, chat history search, and a prompt library. The tool requires JavaScript to run and provides a better user interface for interacting with ChatGPT. Users can log in with Google to access additional functionalities. MyGPT can be used for various applications, such as virtual assistants, customer support, or entertainment purposes. It aims to improve the user experience and make interacting with AI chatbots more efficient and customizable.