Wall Score
Wall Score (WS) is a summary of all your stats including Quest Points, it's your "score" in the game.
You can see your WS on the Score menu so you don't need to calculate it by hand, which can be a bit tricky when wearing many stat-boosting items. Your class and chat-colour will change depending on your WS, and at certain points you'll unlock new chatrooms.
You can compare your WS with others on the Wall Of Flame in the south part of Shilla Town.
Many restrictions in Shilla are based on your WS, such as being able to receive certain items at the Traders.