What does Deuteronomy 31:7 mean?

Then Moses called Joshua over and said to him in front of everyone, 'Be strong and brave, because you're the one who will lead these people into the land the Lord promised to give them. You'll help them take it as their own.' Deuteronomy 31:7 - Modern Text Bible

(Moses publicly passes the torch to Joshua, making it clear he's the new leader and encouraging him to be courageous.)