Dead limbs attract diseases, bugs and fungus, which can kill the tree if not treated or trimmed properly. Pruning helps your trees grow faster, maintain their shape and keeps dead and broken limbs form getting infected. Most tree pruning services are preformed on fruit trees and shrubs. Tree Trimming on the other hand is the service of cutting, shaping, thinning, dead limb removal, tree tips raised, inside growth cleaned out, custom trims and pruning as well.