Exfoliating is like using extremely fine sandpaper on your skin. You are using a mildly abrasive material that buffs away dead skin cells, leaving glowingly healthy skin in its place. Exfoliating has several benefits.
First, old dead skin cells that make your complexion dull are scrubbed off, leaving new fresh skin cells.
Secondly, after exfoliation, it is easier for skin to absorb moisturizers and other skin treatments.
If your complexion is normal to oily, then exfoliating is helpful three to four times a week. For drier skin, exfoliation should only be done one to two times a week maximum.
You should establish a skincare routine that includes a cleanser, toner and moisturizer. You will keep your skin healthy far longer.
Exfoliating will help remove the build-up of dead skin cells from your skin, and will reveal the younger and healthier looking skin underneath.
When exfoliating please take care not to try and scrub your skin to the connective tissue - all you need to do is to gently scrub to remove dead surface cells. Scrubbing your skin with too much vigor and using too abrasive products can irritate your skin, cause damage and leave it open to infections and other problems.
I have dry, mature skin so I usually exfoliate twice a week.