Super Cruise is sorta like riding in a Waymo car, it drives the vehicle hands free. The vehicle must have adaptive cruise enabled and then you push a button on the steering wheel and the super cruise takes over. It has a forward facing camera to keep the vehicle right dead center in your lane. If the vehicle approaches a slower car in front it will automatically slow down and if you want to pass it you just quickly flip the turn signal lever to the direction you want to pass and release it, super cruise will change lanes (using the side cameras) when safe and maintain the current cruise speed already set. If the steering wheel column camera detects you are not paying attention it will disconnect the super cruise and start slowing down immediately. I have driven 50-60 miles and never touched the steering wheel. It truly is an amazing feature, but you still need to be alert. It only works where there are lane stripes on both sides like on freeways also, it will not engage on city streets.
You can always take control of the steering wheel at any time. There are led lights built into the top of the steering wheel, green for all good and on super cruise, blue for you
over riding the super cruise (manual steering) and flashing red for super cruise has disconnected and slowing down.