How to get Traffic from ChatGPT

I noticed that a website of mine gets traffic from ChatGPT and I wondered how that's possible. It's not a lot of traffic - just a few visitors per week - but it's been going for 6+ months now, and real users from all over the world sign up and use my product. I asked ChatGPT how that's possible, but I didn't get a good answer. Is someone else getting traffic from ChatGPT? Any idea how that's possible?