Yama refers to ethical guidelines or restraints in yoga that provide a foundation for moral conduct and self-discipline. These principles include: Ahimsa (non-violence), Satya (truthfulness), Asteya (non-stealing), Brahmacharya (celibacy or moderation), Aparigraha (non-possessiveness). Practicing Yama cultivates ethical behavior and a harmonious relationship with others, promoting inner peace and spiritual growth.