Thrown
For an explanation of all weapon properties, see Weapons.
Thrown is a weapon property that allows a weapon to be used as a projectile with the Throw or Enraged Throw actions.
A melee weapon with this property can be thrown for a ranged attack, and will benefit from the creature's Ability Score Modifier (Strength) and Proficiency Bonus as usual, instead of being treated as an Improvised Weapon. This combines with the Finesse property: if you throw a Dagger, which has both Thrown and Finesse, you can use your Dexterity Modifier for the attack and damage rolls.