Exfoliation refers to the process of removing dead skin cells from the surface of the skin. This can be done through gentle physical exfoliation, such as using a face brush or cloth, or with chemical exfoliants like alpha hydroxy acids (AHAs) and beta hydroxy acids (BHAs). Exfoliation helps to reveal newer, smoother skin cells beneath the surface, improving skin texture and appearance. It can also help to unclog pores and prevent breakouts. However, it's important not to over-exfoliate, as this can irritate the skin and cause redness or sensitivity.