ChatGPT is a chatbot developed by OpenAI that was launched in November 2022 and can answer questions across many domains using its training on 570GB of internet text data. It works by taking user questions and searching its database to provide quick answers, and allows users to provide feedback to continuously update its knowledge. While ChatGPT can give personalized responses and detailed answers freely, limitations include its potential to reduce human creativity, the risk of believing incorrect answers, its current support only for English, and its inability to answer all questions due to ending its training in March 2022.