1. ChatGPT, developed by OpenAI, is an AI-powered chatbot that uses LLM technology to generate text after a prompt. It can be used for various purposes such as programming, scripts, email replies, listicles, and more.

2. Due to its nature, ChatGPT doesn't know or care whether something is true; it generates responses based on the information provided during its training. This can lead to issues when using it for tasks like homework or accusations of crimes.

3. Despite some controversies surrounding misinformation and potential legal issues, ChatGPT is used by multiple enterprises and tech companies, including Microsoft, Looking Glass, and Solana. It's available on iOS and Android devices as a free app.