When you have trees on your property, no matter where they’re located, the most important and common maintenance procedures you have to perform on a frequent basis are pruning and trimming. Even though you can trim and prune your trees by yourself, more often than not, people opt to hire professional tree services for the sake of their peace of mind and of course, to maintain the aesthetics of their property.
Source: http://www.3benefitsof.com/benefits-of-professional-tree-trimming-and-pruning/