Find it or create it. Every photo needs some light.
Finding it takes awareness, observation and knowledge about how your camera is going to see it. Being a good available light photographer is fun but often you don’t have much control.
Creating light is a whole new ball game, especially with flashes. You have to guess what’s going to happen. It’s quite a skill that takes time to master.
One of my favorite photographers is Joe McNally who is truly a master of using small flashes (speedlights) to craft his images. While most of us will start with one on-camera flash and then start using two or three speedlights, Joe has been known to use 28 speedlights for a single shot.
Just imagine the dedication it takes just to charge all the batteries needed to power those suckers.