What term in Power BI refers to a collection of visualizations prearranged in reports and dashboards?

In the context of Power BI, the term that refers to a collection of visualizations prearranged in reports and dashboards is "App." An App in Power BI encapsulates reports and dashboards together, providing a packaged and user-friendly way to share data insights with users. It organizes related content, making it easy for users to navigate through different reports and dashboards without needing to access each one individually.

An App typically includes one or more reports and dashboards that provide specific insights or analytics tailored for a business need. This allows users to interact with and consume data in a streamlined manner while maintaining a cohesive narrative around the data displayed.

In contrast, a dashboard is specifically a single-page collection of visualizations, while a report can consist of multiple pages with in-depth data visualizations. A tile refers to an individual visualization that can be pinned to a dashboard. Thus, the term "App" is the most fitting choice as it represents the complete package of related content designed for user consumption.