Strength

is one of the core player Stats. It plays a major role in determining the damage dealt by the player.

Mechanics
is one of the statistics in the damage calculation when using a melee or ranged weapon.

The formula is as follows:

$$\text{Damage}=\left\lfloor \left(\text{Weapon Damage} + 5\right) \times \left(1 + \frac{\text{Strength}}{100}\right) \times \left(1 + \frac{\text{Crit. Damage}}{100}\right) \times \left(1 + \frac{\text{Additive Multiplier}}{100}\right) \right\rfloor$$
 * Weapon Damage: The weapon's damage stat
 * Strength: The player's strength (including base strength)
 * Crit. Damage: The player's critical damage stat (including base critical damage)
 * Additive Multiplier: A combination of damage boosts from abilities and enchantments

Increasing Base Strength
At the start of the game, players have a base of 0. It can be increased by:
 * Leveling the Foraging skill
 * Obtaining the Forbidden Strength upgrade in the Wither Essence Shop (from Malik in the Dungeon Hub)
 * Obtaining SkyBlock Levels

Increasing Bonus Strength
There are several ways to gain additional bonus. These include, but are not limited to:
 * Most Weapons
 * Weapon upgrades
 * Hot Potato Books and Fuming Potato Books
 * The Art of War
 * Wood Singularity (Wooden weapons only)
 * Certain Armor
 * Certain Accessories
 * Certain Pets
 * Certain Reforges on items
 * Strength Potions
 * Weird Tuba
 * Training Weights
 * Power Orbs
 * Mana Flux
 * Overflux
 * Plasmaflux

Achieving highest possible Strength outside Dungeons
Weapon: Catacombs 50 Recombobulated Withered Flower of Truth enchanted with Chimera 5 with Perfect Jasper Hot and Fuming books (doubled because of Blaze Pet) and Art of War (220+300+12+30*2+5=597)

Armor: Full set of Ancient Frozen Blaze Armor with 2 Perfect Jaspers each and bonus from Blaze Pet  ([40+24+35]*4*1.4=554.4)

Pets: Spooky cupcake pet item on Blaze pet + Chimera 5 and having a player with legendary Parrot Pet around (30+30+20=80)

Accessories: Enriching all Accessories to (19*20+12*15+20*10+8*11+5*16+30*1=958)

Raw strength from Accessories: Artifact of Power, Razor-sharp Shark Tooth Necklace and Blood God Crest (5+10+20=35)

Base Strength: Getting Foraging 50 and Forbidden Strength in Essence Shop (86+5=91)

Temporary bonuses: Plasmaflux, Training Weights, Weird Tuba, Century Cake and Strength Potions, Beacon (35+78.75+30+50+2+10=205.75)

Add all that with the Blaze Pet and Legion bonus (597+554.4+80+958+91+205.75+35)*1.2*1.28=3872 while in Blazing Fortress and whilst having 20 players around with at least one of them have Legendary Parrot Pet equipped.

History
力量 힘 Strength