What does Judges 13:9 mean?

Then the woman came and told her husband, saying, “A man of God came to me, and his face was like the face of the angel of God, very awesome. I didn’t ask him where he was from, neither did he tell me his name;

but he said to me, ‘Behold, you shall conceive, and bear a son; and now drink no wine nor strong drink. Don’t eat any unclean thing; for the child shall be a Nazirite to God from the womb to the day of his death.’”

Then Manoah entreated Yahweh, and said, “Oh, Lord, please let the man of God whom you sent come again to us, and teach us what we should do to the child who shall be born.”

The woman hurried and ran, and told her husband, and said to him, “Behold, the man who came to me that day has appeared to me,”

Manoah arose, and followed his wife, and came to the man, and said to him, “Are you the man who spoke to my wife?” He said, “I am.”

Manoah said, “Now let your words happen. What shall the child’s way of life and mission be?”