This stat determines how good a combatant a character is with whatever weapons or fighting skills you decide your character knows. Also, they’ll be able to learn how to use new weapons and fighting skills more easily, if given proper training.
OOC:
For magic: Your Fight stat is generally used to cast magic when you want to attack enemies, break curses, or blast through obstacles. Common spells include things like disarming an opponent, causing a target harm, or making something explode.
Remember, accidents happen at magic school. If you’re going to learn to defend yourself, you’ll need to apply that knowledge practically, trying to ward off some dangerous spells. You might get hurt, and one student might accidentally hurt another, even under the guidance of a careful, responsible teacher. But anyone who runs around intentionally harming others will find themselves in serious trouble—at least with the school and likely with The Council for the Ethical Use of Magic. Classes that teach this include Defense Against Malicious Magic, History of Magic, and Potions.