ChatGPT is trained on a diverse dataset that includes text from the internet, allowing it to have a broad understanding of language and context. It can generate coherent and contextually relevant responses to text inputs, making it useful for chatbots, virtual assistants, customer support applications, content generation, and more.

Please note that my knowledge is based on information available up to September 2021, and there may have been further developments or iterations of the model beyond that date.