Performance - GPU Visualizer

I’m using the GPU Visualizer to find out what is causing the too high FPS.
I sorted it from highest to lowest, but where do I go from here? What do the first entries about ShadowDepths tell me? What can I do about it?

I had a Skylight and a Directional light both set to stationary. With them being static, the whole shadowdepths stuff is gone and its down from 9-10ms to 4-5ms.