What does Ezekiel 48:12 mean?

Next to the priests’ land, the Levites get a section 25,000 cubits long and 10,000 cubits wide. They serve in the temple, but their land isn’t as sacred as the priests’. Ezekiel 48:12 - Modern Text Bible

(The Levites, who help with temple duties, get their own area next to the priests, but it’s not as holy.)