A Shampoo Bar contains the same ingredients as liquid shampoo, except that it's in solid form. The advantage of using a Solid Shampoo is that the same amount of solid shampoo will last you longer than liquid shampoo, given that solid shampoo does not contain too much water.
How to Use:
Wet your hair with water, and then rub the shampoo bar onto your hair until it is fully covered with the shampoo bar. It foams a lot, so be sure to not apply too much of the shampoo bar on your hair.