Diffusers are devices designed to disperse essential oils or fragrances into the air, creating a calming and aromatic environment in spas, wellness centers, hotels, and homes. Commonly used for aromatherapy, they help promote relaxation, reduce stress, and improve mood. Available in different types such as ultrasonic, reed, nebulizing, and heat-based, diffusers work by breaking down oils into fine mist or vapor for even scent distribution. Many models feature adjustable mist settings, LED lighting, and automatic shut-off functions, making them both functional and decorative additions to relaxation and treatment spaces.