Product Weight Purchase Order in Odoo helps users manage purchases by product weight, along with quantity. Users can store weight details for products, view the total weight per purchase order line, and calculate the overall order weight to improve logistics planning. It is useful when suppliers charge by weight, when freight cost depends on weight, or when teams need accurate weight totals for receiving and storage. With clear weight visibility on purchase orders, users can reduce mistakes, improve vendor communication, and plan transport and warehouse space more effectively.