Traditional climbing, as opposed to sport climbing or bouldering, etc.
Traditional climbing, or trad climbing, is a style of rock climbing in which a climber places all gear required to protect against falls, and removes it when a passage is complete, as distinguished from sport climbing in which all protection and anchor points are permanently installed prior to the climb, and "free solo climbing" which does not use ropes or gear of any kind.
See What's the difference between Sport Climbing and Traditional Climbing
