The Expertise stat drastically alters how the effects of Debuffs are felt by you and your foes. Expertise can increase the duration of Debuffs cast on enemies and increases the damage caused by Stagger effects. It also decreases the duration of Debuffs when they are used on you.If you want to know more about Lost Ark,you can visite https://www.mmoexp.com/Lost-ark/Gold.html