Help to hydrate and moisturize the lips, keeping them healthy and looking their best. In addition,  gloss can also provide a bit of protection for the lips, helping to shield them from the sun's harmful UV rays.Gives lips a shiny lustre slick finish and in some cases to add subtle colour. Glosses can be in liquid form or an easy-to-apply solid. They are typically shiny, but can also have a glittery, opalescent, or metallic finish.