or the Angel of God is one of many terms in the Hebrew Bible used for an angel. The Biblical name for angel (מלאך mal'ak) which translates as "seraph, cherub, messenger or representative, or the theophanic angel" obtained the further signification of "angel" only through the addition of God's name, as ("angel of the Lord," or "angel of God" מלאך יהוה mal'ak Yĕhovah.
Hillsong → Angel Of The Lord
8 On that day the LORD will protect the inhabitants of Jerusalem, so that the feeblest among them on that day shall be like David, and the house of David shall be like God, like the angel of the LORD, going before them. (Zech. 12:8)Other appellations for angels are Benei Elohim, "Sons of God," Gen. 6:4; Job 1:6; and k'doshim, "the Holy Ones".
In the Hebrew Bible angelic messengers often appear to people in the shape of human beings of extraordinary beauty, and are not at once recognized as angels (Gen. 18:2, 14:5; Judges, 6:17, 8:6; II Sam. 24:9). Some angels are said to fly through the air; they become invisible; sacrifices touched by them are consumed by fire; they disappear in sacrificial fire, like Elijah, who rode to heaven in a fiery chariot; and they appear in the flames of the thornbush (Gen. 16:13; Judges, 6:21, 22; II Kings, 2:11; Ex.3:2).