What "bouldering" means in rock climbing

Bouldering is a type of rock climbing that involves scaling relatively short rock formations without the use of ropes or harnesses. In bouldering, climbers typically ascend to the top of a boulder or crag, which can range in height from 10 to 30 feet,depending on the location. The focus in bouldering is on technique, balance, and strength rather than endurance or the ability to climb long distances.