You have mastered the use of a particular weapon, favoring it over others.

When you take this feat, choose a specific type of martial weapon. You may add half your proficiency bonus, rounded down, to attack rolls made with that weapon type (in addition to other modifiers).
Additionally you may add half your proficiency bonus, rounded down, to any damage rolls you make with that weapon type.

Taking this feat requires a Strength or Dexterity score of 18 or higher, and proficiency in the chosen weapon type.