Focus Points

FP, an abbreviation for Focus Points, is a stat in Dark Souls III.

General information
FP is a numerical stat that represents the amount of castings a player can perform. A determined amount of FP is depleted when casting either sorceries, pyromancies and miracles, as well as battle arts. When the player's reserves of FP is insufficient to cast the required amount for one of the aforementioned abilities, the casting won't take effect.

Drinking from the Ash Estus Flask is the main method to replenish lost FP.