What does MP mean in Vesteria?

Excuse me, could you please clarify what "MP" stands for in the context of Vesteria? Is it a specific term related to the game's mechanics, its economy, or perhaps a reference to a particular character or item? I'm curious to know how it fits into the overall gameplay and ecosystem of Vesteria, as I'm an avid player and always looking to learn more about the intricacies of the game. Thank you in advance for your assistance.