The purpose is explicitly yuʿallimu al-nās—to teach the pilgrims the order of the rites. It addresses the route, prayer, the standing and onward movement.
This is on the day before the 8 Dhu al-Hijjah departure to Mina, not the sermon delivered at Arafat on the following day.
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Book of Hajj: Sa’y between Safa and Marwa and the Day of Tarwiyah
The purpose is explicitly yuʿallimu al-nās—to teach the pilgrims the order of the rites. It addresses the route, prayer, the standing and onward movement.
This is on the day before the 8 Dhu al-Hijjah departure to Mina, not the sermon delivered at Arafat on the following day.