Fighting Style Feature or Fighting Initiate Feat
FIGHTING STYLE: ARCHERY
You gain a +2 bonus to attack rolls you make with Ranged weapons.
FIGHTING STYLE: DEFENSE
While you are wearing armor, you gain a +1 bonus to Armor Class.
FIGHTING STYLE: DUELING
When you are wielding a Melee weapon in one hand and no other weapons, you gain a +2 bonus to damage rolls with that weapon.
FIGHTING STYLE: GREAT WEAPON FIGHTING
When you roll a 1 or 2 on a damage die for an attack you make with a Melee weapon that you are wielding with two hands, you can reroll the die, and you must use the new roll. The weapon must have the Two-Handed or Versatile property to gain this benefit.
FIGHTING STYLE: PROTECTION
When a creature you can see attacks a target other than you that is within 5 feet of you, you can use your Reaction to interpose your Shield and impose Disadvantage on the attack roll. You must be wielding a Shield to use this Reaction.
FIGHTING STYLE: TWO-WEAPON FIGHTING
When you make the extra attack granted by the Light weapon property, you can add your ability modifier to the damage of the extra attack.