Magic is a type of energy that can harness the elemental properties of Vana'diel. People who do so are known as mages. Magic has a varitey of effects that can be brought forth to Protect, Heal, or attack a target with such spells as Stone or Banish.
Some jobs use magic, but are balanced in their melee abilities as well.
And other jobs cast magic-type spells.
Schools of Magic
There are three schools of magic: white magic, which focuses on healing wounds, black magic, which deals damage, and blue magic, which is learned from enemies the player has encountered. There is also "red magic", which is a combination of white and black magic but introduces new magic such as spells that let you enchant your armor and weapons with the elements, and the forbidden summoning magic, which allows one to commune with the avatars and elemental spirits of Vana'diel. Songs, which focuses on using the voice and instruments to enhance allies and enfeeble enemies, and ninjutsu, which uses "ninja tools" for offensive or stealth-related purposes, are considered "para-magic" or simply talents. There is also brown magic (and the "digestive magic") magic skill that is only used by some. It uses the same spellcasting animation as black magic, much like how most monsters that call pets use the summoning magic casting animation.