What does Joshua 15:25 mean?

Ekron, Sibmah, and the villages around them, including Nibshan, the City of Salt, and En-gedi, were all part of Judah's territory. Joshua 15:25 - Modern Text Bible

(This verse lists some of the towns and settlements that were included in the land given to the tribe of Judah. These places are in the southern part of their territory, near the desert and the Dead Sea.)