Lip gloss, is less heavy on the lips(although sometimes it can be thicker) than lipstick, which is only designed to color. Coloring lip gloss usually has less opaque coloring than lipsticks.
Lip gloss has become more popular than ever within the last few years. Not only does lip gloss add shine, but are moisturizing and can add a plumping effect to the lips. Using lip liner together with lip gloss also gives a different and more defined look.