Progress is made in the game through experience points (XP) that will grant skill points that can be spent on attributes, skills, or spells. We don't exactly count levels, but a character with more XP will have higher survivability. Currently, there is an all-around cap of level 60. However, stats and disciplines have their own caps and will prevent a character from becoming overpowered.
There are many routes that a player can take in the progression of his or her character, and we encourage you to try them all.