It is true that there are many types of masks on offer, but here are few basic one.
Sheet masks are the most popular type at the moment which come with the wave of Korean beauty products. They are, in essence, a wet fiber sheet contained a lot of liquid formula, aimed to hydrating and removing dead skin cell. Therefore, it is not meant for deep cleansing.
Peel-off masks are another trendy skincare item which you may have seen applied to remove blackheads on social media. It turns into a rubber sheet stuck to your skin after being applied. When pulled out, it is believed to take out impurities from your pores. Hence, it is used for cleansing, but not for hydration and nourishment.
Cream masks are smooth cream that could both moisturize and exfoliate your skin. Some types contain oil but some are oil free. Oil-free type are recommended because it is suitable for all skin type while the other could cause a breakout for certain skin types.
Dry clay is the most natural mask of all because it is not composed of stabilizers or preservatives. You mix it with water before applying to your face. However, dry clay masks may not be suitable for too sensitive skin.