What role does the concept of a "halo" play in the religious beliefs and practices of certain cultures or faiths?

The concept of a "halo" is a symbol of divine presence and holiness in various cultures and faiths. It is often depicted as a glowing circle or aura around the head of a sacred figure, such as saints or deities, representing their spiritual enlightenment or connection to the divine. The halo is a visual representation of the individual's elevated spiritual status and is used to convey their purity, wisdom, and divine grace.