ChatGPT is a cutting-edge AI chatbot developed by OpenAI using their GPT-3 models. It was trained on vast amounts of internet data like Reddit to understand human conversation. While powerful for language tasks, it has limitations as it can provide incorrect answers depending on the input quality. ChatGPT serves different purposes than Google Search and cannot replace it, but can be used for tasks like content creation, translation, summarization, question answering, and more.