ChatGPT is currently a free program with a text-based AI that can generate text and chat like a human, and has over 100 million users. For premium users, which are users who pay a monthly subscription, you can unlock other tools like browsing the web. Open AI, a company founded in 2015, makes it their goal to advance in the froteir of Artificial Intelligence. They also have other AI programs such as DALL-E, which can generate pictures based off text.
Some of the things that ChatGPT is used for include but are not limited to, language translation, summarizing large texts, generating conversations, creating content/original ideas, researching, and so much more. There aren't a lot of limitations to ChatGPT, so anything that can be generated through text, it most likely can do it.
As much as it is great, it also can be very scary dealing with new technology. A total of 15 countries have banned ChatGPT because of misinformation and privacy violations. Because there are not many restrictions on ChatGPT, there is nothing fact-checking what it says. It can also be conterproductive for education, because it can write essays and solve advanced math problems. This creates a controversy between people who believe that it is dangerous and should be limited/banned, and people who believe that it can help society and use it as a tool.