What does Numbers 3:31 mean?

The Kohathites were in charge of the chest that held the covenant, the table, the lampstand, the altars, the tools used in the sanctuary, the curtain, and everything else needed for these things. Numbers 3:31 - Modern Text Bible

(Their job was to care for the most sacred objects: the Ark, the table, the lampstand, the altars, the sacred tools, and the curtain.)