Angels announced Jesus' birth to the shepherds. For unto you is born this day in the city of David a Saviour, which is Christ the Lord. And suddenly there was with the angel a multitude of the heavenly host praising God, and saying, Glory to God in the highest, and on earth peace, good will toward men. Angels do not marry. For in the resurrection they neither marry, nor are given in marriage, but are as the angels of God in heaven.
Some angels help human beings.
Angels are spirit beings. And of the angels he saith, Who maketh his angels spirits, and his ministers a flame of fire. Angels are invisible beings. Angels possess will. Yet thou shalt be brought down to hell, to the sides of the pit.