Shampoo functions to clean the hair and scalp with chemicals called surfactants. Surfactants are a substance which serves to reduce the surface tension of a liquid in which it is dissolved. So shampoo is a soap that removes surface debris from the scalp and hair.
We all know that taking care of your hair is extremely important to keep it strong, healthy, and growing, but it is also just as important to take care of your scalp as well. Your scalp may be hidden under your hair, but that doesn't mean it doesn't need to be taken care of properly.