What is the purpose of on-ground Mina orientation for group leaders and Hujjaj?

What is the purpose of on-ground Mina orientation for group leaders and Hujjaj?

گروپ لیڈرز اور حجاج کے لیے زمین پر مینا کی واقفیت کا کیا مقصد ہے؟
Explanation

The Mina orientation helps group leaders and Hujjaj prepare for the Hajj move.