There are a few different types of flashes that could be considered "good" for the Sony A7III camera. The first is an external flash unit that can be mounted on the hot shoe of the camera. These units typically offer more power and flexibility than the built-in flash, and they allow you to bounce the light off of ceilings or walls for more flattering results. The second type of flash is a ring light, which can be attached around the lens barrel and used for close-up photography or video recording. Ring lights provide even, shadow-free illumination and can be especially helpful when shooting in low-light conditions.