To raise your unit's JobLv, you need to equip all 6 of its required Equipment. New abilities are unlocked as your JobLv increases, so make sure to raise it whenever possible.
How to give a Unit Equipment:
- Tap on Menu (located on top right)
- Tap on Units
- Choose a unit
- In the Equipment section, tap on each Equipment item to equip them
- Once all 6 Equipment pieces are equipped, or are available to be equipped, the JobLv Up button will light up (as shown below)
- Tap the JobLv Up button to increase the JobLv of your unit