The name Gabriel — Hebrew Gavri'el — means "God is my strength" or "strong man of God" (from gever, strong man or warrior, and El, God). Despite this warrior etymology, Gabriel's scriptural function is almost entirely communicative — he appears to announce, to explain, to transmit. He is the divine messenger in the most precise sense: the one who carries the message, who ensures it arrives correctly and who helps the recipient understand what they have received.
Gabriel first appears by name in the book of Daniel — where he comes to explain Daniel's visions, explicitly identifying himself: "Gabriel, make this man understand the vision." This explanatory function — not just delivering a message but ensuring its comprehension — is characteristic. Gabriel does not simply speak and leave; he waits for understanding to dawn, he answers questions, he works to ensure that the divine communication actually lands in the human mind rather than simply passing through it.
His two most significant New Testament appearances — the Annunciation to Mary and the announcement to Zechariah — both involve the revelation of a divine pregnancy, both involve the recipient's shock and questioning, and both involve Gabriel's patient explanation of what is happening and why. Gabriel is the angel of the Incarnation — the being whose message makes divine presence in human form possible. Without Gabriel's "Do not be afraid," there is no Christmas.