Saint Michael is seen as the field commander of the Army of God, giving victory in war to his believers. Saint Michael is represented as a warrior angel, in full armour of helmet, sword, and shield, which often bears the Latin inscription: "Quis ut Deus" meaning One like God, standing over the dragon, whom he sometimes pierces with a lance. Saint Michael is also considered in many Christian circles as the patron saint of police officers and soldiers, particularly paratroopers.

In the Jewish tradition, it is said that Saint Michael prevented Isaac from being sacrificed by his father Abraham when he substituted a ram in the young boy’s place. Jehovah's Witnesses believe that Jesus and the Saint Michael are the same being. In this pre-human existence he was known as the Word of God. He later took human form as Jesus and led a life without sin.

In Phrygia (modern-day Turkey) where he was first venerated, he was renown as an angel healer.  Tradition relates that Saint Michael caused a medicinal spring to spout at Chairotopa near Colossae, where all the sick who bathed there were cured after invoking Saint Michael.      

In the Roman Catholic calendar of saints and the Lutheran Calendar of Saints, his feast day, once widely known as Michaelmas, is celebrated September 29. In Australia, National Police Remembrance day is commemorated on September 29 each year, being the feast day of Saint Michael. In the Eastern Orthodox Church his principal feast day is November 8.