Damage: The Damage stat dictates how much damage the weapon does. The Damage stats for a weapon are X / Y / Z:X is Physical Damage
Y is Magical Damage
Z is Fire Damage
Bleed, Poison and Plague are bonus damage over a period of 60 seconds. So, if a weapon has "Bleed 120", the victim will suffer 120 damage over 60 seconds, or 2 damage per second.
Each weapon has one or more physical damage types:
Normal
Blunt
Slashing
Piercing
Certain enemies are weak or strong against different types of damage types.
Durability: The durability of the weapon. The effectiveness of the weapon will severely deteriorate when the durability falls below 30%.
Weight: The weight of the weapon. Note that carrying over 50% of your Equip Burden will reduce the speed of your rolls, while going over 100% will reduce your regular speed to walking and attempts to roll or backstep will leave you momentarily stunned.
StatsNeeded: The Stats Needed determines how high various Stats must be in order to wield the weapon effectively. The Requirement stats for a weapon are W / X / Y / Z:
W is the Strength required
X is the Dexterity required
Y is the Magic required
Z is the Faith required
Wielding a weapon without the required Strength and/or Dexterity will incur a penalty to the Physical damage of the weapon, while lower-than-required Magic and/or Faith will reduce the Magic damage of the weapon.
Also keep in mind that your character gains a 50% bonus to Strength by wielding a weapon with both hands, thus reducing the actual Strength required. For example, a character with 18 Strength can wield a Great Axe (Requires 26 Strength) properly if the weapon is held with both hands.
(18 x 1.5 = 27)
StatBonuses: The Stat Bonuses rating indicates the level of bonus damage you do with the weapon, based on the associated Stat. This rating can be S, A, B, C, D, or E (in order from most to least bonus for the associated skill)