Mana: Mana are use to cast magic. Can regenerate overtime, restore with magic potion, or regenerate faster with meditation skill. You can't cast spell if you don't have the require amount.

Stamina: Same function as Mana, but was use by battle/life/gathering skill. It can be regenerate overtime or restore with stamina potion/food.

Hunger: When stamina car's color turn black, it mean the character is hungry and eating food will restore it.Half the bar will become black when your hunger reach zero and you will start to lose weight till you look really skinny, but the worst is when you start to lose stat until you eat some food to stabilize and maintain your hunger. Food effect will only affect you after age 17 and if you eat food that fill more hunger than it will, then your character will get mabinogi gold fat. Being fat has it pro and con.

EXP: You can earn experience point by doing quest, part time, defeat monster, etc. and when this reach 100%, you level up.

LV: Your Level. Leveling up will completely restore your life, mana, stamina, and hunger. No known limit for level yet.

AP: Ability Point are earn from doing quest, level up, aging, etc. It is use for raising rank of your skill to make it better and/or stronger. However, is not easy to earn AP, so please be careful spending it.

Stats
Str: Max, Min melee type damage.
Every 10 Str will add +4 to maximum damage and +3 to minimum damage
Accurately, Every 2.5 Str will add +1 to maximum damage and every 3 Str will add +1 to minimum damage
Int: Magic Balance, Wound rate, Success rate of learning skill from book.
Dex: Balance, Long Range damage, production type skill success rate. Kit's said that it help with magic damage too.
Every 10 Dex adds +4 to maximum damage and +2 to minimum damage.
Every 10 Dex adds +1.0% to maximum wound rate and +0.5% to minimum wound rate.
Accurately, Every 2.5 Dex adds +1 to maximum damage and every 3.5 Dex will add +1 to minimum damage.
Will: Critical Rate, Deadly Status Activation Rate,
Every 10 Will adds 1.0% to Critical.
Every 10 Will adds +2.0% to maximum wound rate and +0.5% to minimum wound rate.
Luck: Lucky Finish Rate, Critical, Extra Reward Rate.
Every 10 Luck adds +2.0% to Critical.

Damage: Represent with Minimum ~ Maximum damage.
Injury/Wound : Percentage of wound you can cause.
Critical: Chance to deal more damage, but must learn the skill "Critical Hit" first.
Balance: Affect how close to the maximum damage you canmabinogi gold  deal, but Balance is capped at 80% and the damage deal are around -6%~+6%

Example: Your weapon damage is 0-100, and your balance is 50%, then you will deal around 47-53 damage since 50% of 100 is 50 and the variation of -+6% make it -3 to +3.
Defense: Reduce the amount of damage. If a monster that deal 100 damage and you have 1 defense, then you receive 99 damage.
Protection: Reduce the amount of damage by percentage and chance of monster critical attack you. 100 damage against a 10% protection result in 90 damage.