Reiki is a non-invasive, ancient Japanese healing technique that uses the flow of universal life energy to promote relaxation, reduce stress, and support the body's natural ability to heal. It involves a trained practitioner gently placing their hands on or near the client's body, transferring healing energy to alleviate physical, emotional, and spiritual imbalances. Reiki is known for its ability to enhance well-being, reduce pain, and improve energy levels, making it a valuable holistic service for personal growth and stress management.