Key Performance Indicators (KPIs) allow you to set specific targets for pages and interactive features within your issue. They can help gauge the success of your publication against parameters that you define.
A KPI is specified as a percentage when you edit a module within the interactivity area. At the reporting stage, PageTiger performs a calculation against the unique views for the element that has a KPI attached. It then indicates whether this KPI is being met or not and provides a percentage for the actual amount of readers that are viewing the element.
The KPI indicator is displayed in the Page/Module panel and will be green if the target is being met and red if it is not. Bear in mind that KPIs are percentages and not numeric targets, so the success of your targets could change over time.