Believing in the existence of Angels is the second pillar of belief.
They are beings that we cannot see. We only know about them as much as Allah tells us in His book, or His Messenger (peace be upon him) informs us.

     Allah created the angels from light as stated by Prophet Muhammad (peace be upon him): “The angels were created from light, the Jinns were created from dark flames of fire…”

     Angels are completely obedient to Allah and worship Him. Muslims do not worship angels since they have no power to do either good or harm, except by the Will of Allah.