How do I convert USDT to USD?

I'm curious about how I can convert USDT to USD. Could you please explain the process to me? I've heard that there are specific platforms or exchanges that facilitate this conversion, but I'm not quite sure how it works. I'm also interested in knowing if there are any fees involved in the conversion and if there are any risks I should be aware of. Could you guide me through the steps involved and provide any advice on how to ensure a smooth and secure transaction? Thank you for your help!