A face sponge is a skincare tool, often made from natural cellulose or synthetic material, used for deep cleansing, gentle exfoliation, and makeup removal, coming in compressed or pre-expanded forms, with types like Konjac offering added ingredients (charcoal for oily skin, clay for radiance) for different needs, providing a soft, absorbent, and reusable way to achieve smoother, clearer skin by removing dirt, oil, and dead cells.