Game Mechanics

Your Stats
Damage (DMG) affects how much damage you do to other players. By default, it will almost always be 100% (Base damage.) and will not do any more or less damage than usual unless you have higher damage or the opponent has lower defense.

Defense (DEF) determines how easily you can shrug off attacks. A higher defense stat will mean you take less damage, and vice versa. Tank classes are known for their higher than usual defenses at the cost of mobility.

Speed (SPD), also known sometimes as Movement, will influence your current speed and how fast you move across the map.

Technical Statistics
Available often in the pages of the Wikia are officially confirmed statistics that you will often not notice. These include but are not limited to:
 * Stun Output: Often a percentage set to 100%, this dictates how much (in %) extra stun a class is dishing out.
 * Stun Resistance: Inversely to above, this is like defense but for stun. How much less stun you will take per hit.
 * Knockback Resistance: Some classes are harder to knock around than others.
 * Mitigation: See the section below.

Mitigation and Barriers
Mitigation is a special status given to a select few classes and even bosses, and provides a very interesting variation to defense. This was explained by Flylph in