Simple Weapon Familiarity is a Weapon Familiarity that uses the Melee, Propel, or Shoot Combat Operation. The making, repairing, and maintenance of such weapons is not necessarily effectively known or understood, though familiarity helps.
Simple weapons generally any humanoid species can understand and easily use; They rely more on a physicality of mass and leverage more than anything else. These are often found in the hands of commoners that can just pick them up and use them with little training.