What does 2 Kings 23:2 mean?

He went up to the Lord’s temple, and all the people of Judah and Jerusalem came with him—priests, prophets, and everyone else, from the least to the greatest. He read out loud everything written in the book of the covenant that was found in the Lord’s temple. 2 Kings 23:2 - Modern Text Bible

(Josiah brings everyone together and personally reads the entire book of the law to them, making sure everyone hears what God expects.)