There are so many steps in the K-beauty routine and there are so many products involved.It can be confusing, especially when it comes down to essence, serum and ampoule. They all hydrate and nurture skin, just doing it differently. So by better understanding, you can layer on products cleverly and optimize the effects. Testing and trying takes lots of time and money, and it may even harm your skin if you used unsuitable products. Don’t worry, we have compiled a guide for you with product pickups. Scroll down and read on.