What does Joshua 20:7 mean?

So they picked out these cities: Kedesh in Galilee in the hill country of Naphtali, Shechem in the hill country of Ephraim, and Kiriath Arba (that’s Hebron) in the hill country of Judah. Joshua 20:7 - Modern Text Bible

(Three cities are named as safe places in different regions, making sure everyone in Israel has access to protection if they need it.)