Conditioner is a hair care product that is used to improve the texture, appearance, and manageability of hair. It is typically applied after shampooing and left in the hair for a few minutes before being rinsed out. Conditioner works by providing moisture and nourishment to the hair, which helps to prevent breakage, improve elasticity, and reduce frizz. It also helps to detangle the hair and make it easier to comb or brush.