What does Joshua 21:11 mean?

They gave them Kiriath Arba (that’s Hebron) in the hill country of Judah, along with the surrounding pastures. Arba was the father of Anak. Joshua 21:11 - Modern Text Bible

(Hebron, a significant city, is given to the priests, along with its fields. The note about Arba connects the city to its ancient roots.)