If you want to stop fast-moving subjects, the effects that a flash provides can help.
While newer photographers will always try to stop a fast-moving subject by cranking up their ISO setting and increasing the shutter speed, it isn’t always the most effective method. In fact, it can cause a more problems for you in post-processing where you’ll enjoy creating awful photos. One of flash’s biggest benefits is what it can do for photographers, not only for providing light on a subject but also for extra benefits like stopping motion. However, not all flashes are created equal in that capacity.