ChatGPT is a natural language processing tool driven by AI technology that allows you to have human-like conversations and much more with the chatbot. The language model can answer questions and assist you with tasks, such as composing emails, essays, and code.

Also: How to use ChatGPT: What you need to know now

It's currently open to use to the public for free because ChatGPT is in its research and feedback-collection phase. A paid subscription version called ChatGPT Plus launched at the beginning of February.

ChatGPT was created by OpenAI, an AI and research company. The company launched ChatGPT on November 30, 2022. 

Also: 3 ways OpenAI says we should start to tackle AI regulation

OpenAI is also responsible for creating DALL-E 2, a popular AI art generator, and Whisper, an automatic speech recognition system. 

It's a big deal -- think internet-level disruption. 

"ChatGPT is scary good. We are not far from dangerously strong AI," said Elon Musk, who was one of the founders of OpenAI before leaving. Sam Altman, OpenAI's chief, said on Twitter that ChatGPT had more than one million users in the first five days after it launched. 

Also: ChatGPT: Who's using the AI tool and why?

According to analysis by Swiss bank UBS, ChatGPT is the fastest-growing app of all time. The analysis estimates that ChatGPT had 100 million active users in January, only two months after its launch. For comparison, it took nine months for TikTok to reach 100 million users.