What is the method of using a tree limb to find water?

The method of using a tree limb to find water, often called "water witching" or "dowsing," involves holding a forked stick or a Y-shaped branch and walking around an area. Practitioners believe that the stick will twitch or point downward when over a water source. While some claim success with this method, scientific studies have largely debunked its efficacy, attributing any perceived results to chance rather than a reliable technique. Its use remains a folk practice in many cultures.