You can add temporary effects to equipment, giving an additional stat bonus for the next 7 days. Enchantments can be found under the respective tab in the Workshop.
Only one enchantment effect can be active on a piece of equipment at the same time. Applying a new bonus to the gear that was recently enchanted will fully replace the effect of the previous enchantment (resources for the previous buff will not be refunded). However, switching equipment will not dispel the enchantment.
Enchantment requires special materials: Enchantment Dust, various stones, essences, etc. If you're lacking one of the required items - tap its icon to learn which in-game events it can be acquired from.