Druid is an ancient Celtic spiritual tradition that dates back to the Iron Age. It was practiced by a class of people known as Druids, who served as priests, prophets, and teachers in Celtic society. The Druids were believed to possess supernatural powers and were responsible for performing rituals, divination, and healing. They were also responsible for preserving and passing down oral traditions and knowledge. The term Druid comes from the Celtic word for 'oak tree, ' which was associated with wisdom and knowledge. The Druids were divided into three classes: the Bards, who were responsible for preserving and passing down oral traditions; the Ovates, who were responsible for divination and healing; and the Druids, who were responsible for religious ceremonies and rituals.