What does Jeremiah 26:18 mean?

'Back when Hezekiah was king of Judah, Micah from Moresheth prophesied to all the people of Judah. He said, “The Lord of Armies says: Zion will be plowed like a field, Jerusalem will become a pile of rubble, and the temple hill will be overgrown.”' Jeremiah 26:18 - Modern Text Bible

(They remind everyone that earlier prophets also warned of disaster, quoting Micah’s prophecy about Jerusalem’s destruction.)