Gongs are large, circular percussion instruments made of metal, typically bronze or brass. They produce a deep, resonant sound when struck with a mallet. Gongs come in various sizes and are used in different musical traditions around the world, including in Chinese and Balinese music. In addition to their musical use, gongs are often employed in spiritual and ceremonial contexts. They can symbolize the beginning or end of a ritual and are believed to have calming effects. Gongs are also popular in sound therapy, where their vibrations are used to promote relaxation and well-being.