Strength defines ones physical prowess and raw muscle. Having a strong body can be quite imperitave in battle, or life threatening situations as a whole.

Strength increases damage for weapons with Strength-scaling. Without Strength, people are weak and thin. They may not push open barricaded doors easily, hang onto a window sill for very long, or even do much damage when hitting a foe with a hammer. With musculature, you are sure to have more confidence in any situation where your body needs raw power. While certain weapons deal damage based off of Dexterity, many weapons rely on Strength for doing damage. This should be taken seriously if you intend to use blunt or heavy melee weapons.