Shadow Clone Jutsu is a technique from the popular anime and manga series Naruto. It allows a ninja to create multiple copies of themselves, known as clones, that can act independently. Unlike simple illusions, these clones have physical substance and can perform tasks, fight, or gather information. The technique requires a significant amount of chakra, the energy used for jutsu. Each clone shares the user's experiences and memories, making them useful for training or strategizing. However, if a clone is injured or destroyed, the user feels the pain, emphasizing the connection between the original and the clones.