A vocal steamer uses warm steam to hydrate and soothe vocal folds, helping to relieve dryness, irritation, and tension. It is used by singers, professional voice users, and others who want to improve vocal health, primarily by providing direct topical moisture to the vocal cords, which can improve their function and performance. Key uses include pre-performance preparation, post-performance cool-down, and general maintenance to maintain a healthy voice and prevent strain.