The ranged counterpart to Battle, Shoot is the skill of using conventional ranged weaponry, either in a conflict or on targets that don’t actively resist your attempts to shoot them (like a bull’s-eye or the broad side of a barn). For ranged attacks using unconventional weapons, see Brawl.
Overcome: Unless, for some reason, you need to demonstrate your Shoot ability in a non-conflict situation, you probably won’t be using this skill for normal obstacles much.
Create an Advantage: In physical conflicts, Shoot can be used to perform a wide variety of moves, like trick shots, keeping someone under heavy fire, and the like. In cinematic games, you might even be able to disarm people and pin their sleeves to walls—pretty much anything you’ve seen in an action movie.
Attack: This skill makes physical attacks. You can make them from up to two zones (or appropriate distance) away, unlike with Battle. (Sometimes the range will change with the weapon.)
Defend: Shoot is unique in that it doesn’t really have a defense component to it—you’d use Athletics for that. You could use it to lay down some covering fire—which might act as a defense for your allies or provide opposition to someone else’s movement—though it could just as easily be represented by creating an advantage (Covering Fire or Hail of Bullets, for example).