You repair the target item, restoring 5 Hit Points per spell rank and potentially removing the broken condition if this repairs it past the item's Broken Threshold.
Concentrate
Manipulate
Rank
1
Traditions
Arcane, Divine, Occult, Primal
Traits
Concentrate, Manipulate
Cast
10 minutes
Range
touch
Targets
non-magical object of light Bulk or less
You repair the target item, restoring 5 Hit Points per spell rank and potentially removing the broken condition if this repairs it past the item's Broken Threshold. You can't replace lost pieces or repair an object that has been completely destroyed.
Heightened
2nd
You can target a non-magical object of 1 Bulk or less.
3rd
You can target a non-magical object of 2 Bulk or less, or a magical object of 1 Bulk or less.
Source: Pathfinder Player Core, p. 343
Bring Mending into a Pathfinder 2e game with The DM Screen.