A report in Hootsuite Analytics has a flexible, interactive interface into which you can drag and drop an unlimited number of:

In Hootsuite Analytics, reports are built using "tiles." Tiles are the fundamental building blocks of a report, each designed to display a specific metric or data point. Their drag-and-drop functionality allows for a customizable and interactive reporting experience. "Templates" are incorrect because while reports can be based on templates, templates themselves are not the draggable elements within a report. "Overviews" are pre-configured collections of data, not individual interactive components. "Trendwatchers" are a specific type of dashboard or report in some analytics tools, but not the flexible building blocks within Hootsuite Analytics reports. "Campaigns" are a broader marketing concept and not a component of report building within Hootsuite Analytics.