Definition
A diffuser is a device used to spread something out, whether it's light, sound, or scent. For light, it softens harsh shadows and creates a more even illumination. For scents, it disperses essential oils into the air, creating a pleasant aroma. Think of it as a smoothing tool that avoids direct intensity. Light diffusers are common in photography, while scent diffusers are popular for aromatherapy. A diffuser makes things softer and more pleasant.