Defense Against the Dark Arts is a vital subject taught at Hogwarts School of Witchcraft and Wizardry, focusing on the study of dark magic and how to protect oneself from it. Students learn about various dark creatures, curses, and spells, equipping them with the knowledge to defend against malevolent forces. Throughout the years, the curriculum has evolved, featuring different professors, each bringing their unique expertise. Notable figures in this field include Remus Lupin, who taught about werewolves, and Dolores Umbridge, known for her controversial methods. Mastery of this subject is essential for any aspiring witch or wizard.