hair clips?

I keep reading posts about people clipping their roots or certain parts of their head while hair is wet and letting it dry that way. I'm uncertain of how to do this. does anyone have pics or can explain this?

Thanks :D
2c, 3a and 3b combined. I think anyway
Love Activate poo, Jessicurl too shea and aloeba as a leave in, Curls spiral cream(old version) and milkshake!!