What is a rainwater diverter and do I need one?

A rainwater diverter helps disperse heavier flows of rainwater over a wider space of your gutter to lessen the chance of the water running over your gutter. A typical location of where you would install a rainwater diverter would be on your inside miter gutter (roof valley intersection). It does this by keeping most of the organic debris from piling up on top of the gutter guard.