Oily skin is special in the way that it has increased sebum production and has a higher chance of impurities. Like all skin types though, it needs adequate moisturisation and gentle cleansing to restore and maintain the skin's natural balance.
Oily skin tends to also be quite shiny and is more prone to pimples and breakouts. This is because excess oil and dead skin cells clog the pores of the skin causing inflammation and these blemishes.
Like any skin type, an appropriate skin care routine is incredibly important, and daily cleansing, toning and moisturising is the best base. Find out which ingredients and skin care products are best for oily skin types.