google-analytics - 谷歌分析 op_scope 用于页面跟踪

Question

Javascript Google Analytics 提供了一个 setCustomVar 方法，允许我们提交将出现在报告中的自定义数据。但是，我不清楚 opt_scope 参数:

opt_scope   Optional. The scope used for the custom variable. Possible values are 1 for visitor-level, 2 for session-level, and 3 for page-level. 

https://developers.google.com/analytics/devguides/collection/gajs/methods/gaJSApiBasicConfiguration#_gat.GA_Tracker_._setCustomVar

我在哪里可以找到有关这三个选项的更多信息？

Answer 1

Tracking Custom Variables对 Google Analytics 中的自定义变量范围有很好的描述。

Each of these three levels of interaction defines a specific scope of visitor engagement. This distinction is important to custom variables because each custom variable is restricted to a particular scope. For example, you might want to know the number of sessions where visitors removed an item from their shopping cart. For that particular case, you would define the custom variable to the session level, so that the entire session for that visitor is flagged as one in which items were removed from online carts.