What does 2 Chronicles 31:2 mean?

Hezekiah set up the divisions of priests and Levites by their groups, each with their own responsibilities for offering sacrifices and leading worship and praise at the Lord’s gates, just as David had organized. 2 Chronicles 31:2 - Modern Text Bible

(Hezekiah restores the temple service, assigning priests and Levites to their roles as originally set by King David.)