What does Joshua 12:7 mean?

Here’s a list of the kings Joshua and the Israelites defeated on the west side of the Jordan River, from Baal-gad in the valley of Lebanon all the way up to Mount Halak, which rises toward Seir. Joshua gave their land to the tribes of Israel, dividing it up among them. Joshua 12:7 - Modern Text Bible

(This verse introduces the territory and the list of kings Joshua conquered after crossing the Jordan, marking the land that was distributed to the Israelite tribes.)