To prevent gutters from backing up and causing leaks inside the home, gutter guards are the ideal solution. Essentially, a gutter guard is a roof over the gutter which allows water to pass through screening out any of the debris.
There are several types of gutter guards available at several price points. I only recommend and use screens. They are relatively easy to install, are not expensive and don’t require touching the shingles on the roof. Touching the shingles can disturb the roof system.