Drawing out impurities in your skin and taking away dead skin cells is very important as having a lot of dirt lying on your skin can cause a lot of irritation on your skin and make you break out. The texture of your skin can get rough and bumpy so give your skin a good clean out every once in a while.
One of my favourite masks to do this job is The Body Shop Himalayan Charcoal purifying glow mask. As it dries on your skin it absorbs excess oil on your skin and then you can use it as an exfoliator to draw out any impurities. Then you are left with soft healthy youthful skin. Maintain your skin after with applying a serum as it will absorb into the skin very quickly and work at its best.