您的同事在移动网络、移动应用和桌面版网站等多个平台上投放了广告系列。在查看自己的广告系列时，他们发现系统未显示与移动设备相关的指标数据。导致这一错误的原因可能是什么？

The correct answer is that the Report Builder was missing mobile reporting dimensions. Campaign Manager 360's Report Builder requires specific dimensions (like "Device Type," "Operating System," or "Mobile Carrier") to display mobile-related metrics. If these dimensions are not included in the report configuration, the data will not appear, even if the campaign ran on mobile platforms. "The campaign settings were missing the 'mobile website' option" is incorrect because campaign settings define where ads run, not how reports display data. "They only used 'mobile app installs' as a filter" is incorrect; while a filter, it wouldn't prevent all mobile metrics from showing, only narrow the focus. "They only used 'mobile app' as a platform filter" is also incorrect; a filter limits data, but the underlying mobile dimensions still need to be present to show any mobile-specific data.