What does Joshua 1:17 mean?

Joshua secretly sent two men from Shittim to scout out Jericho. He told them, 'Go look over the land, especially Jericho.' They went and entered the house of a woman named Rahab, who ran an inn, and stayed there. Joshua 1:17 - Modern Text Bible

(Joshua sends spies to gather information about Jericho. They stay with Rahab, who is not an Israelite, showing the beginning of an unexpected alliance.)