Make weight-reduction pruning cuts on over-extended limbs to reduce failures
Uplift and balance a canopy
Address defective and hazardous limbs
When Should I Start Pruning / Trimming It's best to start Pruning / Trimming your trees when they are young because you're able to address potential risks before they become actual problems and can encourage the healthiest formation of growth for the tree.
It's significantly easier to correct the structure of the tree when limbs are only the thickness of a finger because the tree can heal the wound quicker and easier than it can once it's matured.