發生轉換事件時，哪項 Floodlight 功能可以評估網頁上的特定元素？

Custom variables (U-variables) in Floodlight are designed to capture specific, dynamic information from a webpage at the time of a conversion event. This allows you to evaluate particular elements, such as product IDs, categories, or transaction values, which are then passed into Campaign Manager 360 for detailed reporting and analysis. Custom dimensions and custom attributes are related concepts but are typically used for broader classifications or user-defined segments, not for capturing specific, dynamic page elements during a conversion. Custom parameters is a more general term and not the specific Floodlight feature for this purpose.