A hairdryer is an electrical device used to dry and style hair. It works by blowing warm or hot air over wet hair, which helps evaporate moisture quickly. Most hairdryers have adjustable heat and speed settings, allowing users to customize their drying experience. Hairdryers often come with attachments like diffusers and concentrators to enhance styling. They are commonly used in homes, salons, and spas. The invention of the hairdryer revolutionized hair care, making it easier and faster to achieve desired hairstyles compared to air drying alone.