What does Zechariah 6:13 mean?

'He will build the Lord’s temple, and he will be honored. He will sit and rule on his throne. There will also be a priest on his throne, and there will be peace between them.' Zechariah 6:13 - Modern Text Bible

(The Branch will have both kingly and priestly roles, bringing unity and peace. This points to a future time when leadership and spiritual guidance are joined together.)