What does Numbers 4:16 mean?

Eleazar, Aaron’s son, is in charge of the oil for the lamps, the incense, the daily grain offering, and the anointing oil. He’s responsible for the whole sanctuary and everything in it, including the holy things and their tools. Numbers 4:16 - Modern Text Bible

(Eleazar has a leadership role, making sure all the most important supplies and objects are cared for and used properly.)