Short answers, pulled from the story.
Metatron is a celestial scribe and angel in Jewish and Islamic mythology who records the deeds of Israel and serves as the angel of the veil. In Jewish tradition, he is the transformed Enoch, while Islamic tradition identifies him as Mīţaţrūn, the angel of the veil who knows what lies beyond the divine veil.
The story of Elisha ben Abuyah entering the heavenly palace and witnessing Metatron sitting on a throne occurred in the year 100 CE. This incident is recorded in the Babylonian Talmud and led to Elisha falling into heresy before the rabbis subjected Metatron to sixty strokes with fiery rods to prove he was an angel.
Scholars debate the origin of the name Metatron, with Philip Alexander suggesting it may come from a magical word in Hekhalot literature and others like Hugo Odeberg linking it to the Hebrew word for guard. A controversial theory proposes the name derives from the Old Persian name Mithra, while the Greek etymology combining meta and thronos is dismissed by many as lacking historical evidence.
The Book of 3 Enoch explicitly refers to Metatron as the Lesser Yahweh, a title that raises theological questions and seems to reference Yahoel rather than the name of God Yahweh. Some scholars believe the title was deliberately omitted from later copies of the Talmud to avoid heretical interpretations regarding the worship of an angel.
Metatron appears in modern novels, films, and television series such as Gravity's Rainbow, Good Omens, His Dark Materials, Dogma, and Supernatural. These portrayals depict him as a spokesperson of God, the main antagonist, the voice of God, or the scribe of God, reflecting the enduring fascination with this celestial figure.