There is more to it than you think!
An arborist will prune trees to accomplish many different objectives such as improving structure, provide clearance, reduce risk, and aesthetics.
It is important when pruning trees to identify the objective and make only the necessary cuts to accomplish it. Removing too many, or incorrect, limbs and branches, or pruning at the wrong time of year, can have detrimental effects on the health of your tree.
An arborist can help you determine the best plan of action specific to your tree and your needs.