Diffusers are devices used to disperse essential oils into the air, creating a pleasant aroma while promoting relaxation, focus, or other therapeutic benefits. By breaking down essential oils into fine particles, diffusers release the oils’ fragrance into the surrounding space, helping to improve air quality, reduce stress, or enhance sleep. Common types include ultrasonic diffusers, which use water and ultrasonic waves to disperse oils, and heat or nebulizing diffusers, which release oils without water. Diffusers are popular in homes, offices, and wellness settings to create a calming environment.