A face pack (or face mask) is a skincare treatment applied to the face for deep cleansing, hydration, brightening, or targeting specific concerns like oiliness or acne, using ingredients from clay/mud (Multani Mitti, charcoal) to serums (hyaluronic acid, green tea) in ready-made or DIY forms (sheet masks, paste) to give skin a refreshed, glowing look by removing impurities, balancing pH, and improving texture, typically used 1-3 times weekly after cleansing and before moisturizing.