https://humanlove.stream/wiki/....What_Is_Item_Upgrade
Item Upgrading and Rerolling in World of Warcraft Upgrades can be made to items to improve their performance. Upgrades to gear are important particularly early on. Upgrade your BiS (Best in Slot) items first, then move on to other items that are compatible with your game. The process of upgrading an item is accomplished by using Upgrade Tokens to fund the item's upgrade window. The number of upgrade slots is different by item type. Upgrade components Upgrade components are special items that can be put into weapons,