Judaism and Christianity both include angels in their cosmologies and have done so for centuries.
They are an integral part of our popular culture, folklore, and fantasy, and have been represented in a wide variety of artistic mediums.
But just what are they? As for their roles, please explain.
The Greek word aggelos, meaning "messenger," is the etymological ancestor of our English word "angel."
The Old Testament Hebrew term for angel has the same meaning.
The purpose for which angels were created was to assist God.