Scalp Advanced Anti-oiliness Dermo-purifier shampoo was targeted-formulated for oily scalps. Scalp is skin, but a much more complex one. Sebum oxidation and micro cracks on the scalp surface can create numerous issues. It's a vicious cycle and you want out.

Apply evenly on wet scalp and hair
Gently lather with the softest part of the tip of your fingers and without over-massaging (to not excessively activate the sebum glands)
Rinse thoroughly
In case of contact with eyes, rinse them immediately and thoroughly