What does Judges 6:22 mean?

Gideon went in and prepared a young goat and unleavened cakes of an ephah of meal. He put the meat in a basket and he put the broth in a pot, and brought it out to him under the oak, and presented it.

The angel of God said to him, “Take the meat and the unleavened cakes, and lay them on this rock, and pour out the broth.” He did so.

Then Yahweh’s angel stretched out the end of the staff that was in his hand, and touched the meat and the unleavened cakes; and fire went up out of the rock, and consumed the meat and the unleavened cakes. Then Yahweh’s angel departed out of his sight.

Yahweh said to him, “Peace be to you! Don’t be afraid. You shall not die.”

Then Gideon built an altar there to Yahweh, and called it “Yahweh is Peace.” To this day it is still in Ophrah of the Abiezrites.

That same night, Yahweh said to him, “Take your father’s bull, even the second bull seven years old, and throw down the altar of Baal that your father has, and cut down the Asherah that is by it.