Up-leveling
You could up-level or upgrade your skill level and job level by serving warfare or accomplishing quest missions. Once you up-leveled, you would obtain bonus points as reward as well as experiencing special effects of upgrading.

........................................................................
Status Upgrade
Distribute the bonus points which you are rewarded during up-leveling in the status window and your game character will become stronger as stamina enhanced.

Click the arrow sign besides the character's status to upgrade its stamina.
........................................................................
Skill Upgrade
Once your job level gets up-leveled, you will be given skill points. Utilize these skill points and you can get skill level up too.