A face mask is a skincare product that is used to deeply cleanse and nourish the skin. The length of the mask is usually 20 minutes to 30 minutes, depending on the product's instructions. Masks can be divided into different types, such as hydrating masks, whitening masks, anti-aging masks, etc., and choosing the right mask according to your skin's needs can achieve better results. The general way to use the mask is to cleanse the face first, then apply the mask evenly to the face, avoiding the eye and lip area, and let it sit for a while before rinsing it off with water. The function of the mask is to deeply cleanse pores, remove dirt and keratin from the surface of the skin, replenish the moisture and nutrients needed by the skin, and make the skin smoother, more refined and more elastic. Face masks are a simple and effective skincare method that can be used at home once or twice a week and can be very helpful in improving the quality of your skin.