下列哪項指標可用於評估價值？

The number of items in a shopping cart is a strong indicator of value because it directly reflects user intent to purchase and the potential revenue generated. A higher number often signifies greater interest in a brand's offerings. Page views and time on site are engagement metrics, but they don't directly quantify potential monetary value. A user could view many pages or spend a long time on a site without adding anything to their cart. Cost per click (CPC) is a bidding strategy and a cost metric for advertising, not an indicator of value derived from user behavior.