« I only use water to wash my face » I have a question for you.

Hello, I know a lot of people who have greats skins and when I ask them how they do. They tell me that they only wash their face with water. I want to try and I was wondering what do they mean by that. If some people are doing this, I have a simple question. Do you just rinse your face in the shower with the showerhead and that’s it ? Or do you use your hands with the water to wash your face (If yes how you do it ?) ? Thanks !