The answer to 'types of tree trimming' is that there are several common types of tree trimming that homeowners may need to consider. The most common are crown thinning, crown raising, and crown reduction.
Crown thinning involves selectively removing branches to allow more light and air to pass through the tree's canopy. Crown raising involves removing the lower branches to increase clearance underneath the tree. Crown reduction is done to decrease the overall size of the tree by cutting back the main branches.