Open and close the wooden fence gate. Watch how the latch hardware operates as you open and close it. If parts are rubbing together, the hardware needs adjustment.
Close the wooden fence gate. Loosen the screws on the gate latch hardware with a screwdriver.
Align both parts of the latch so they no longer rub against each other when the latch is used. Hold the latch in place, and tighten the screws with a screwdriver.
Test the adjustment you made to the gate hardware by opening and closing the latch. Loosen the screws and make any further adjustments as needed.