Which of the following is NOT a building block of Power BI?

Power BI is a powerful tool for data visualization and business intelligence, built upon several key components that help users analyze and represent data effectively. Reports, dashboards, and tiles are all essential aspects of the Power BI environment.

Reports are comprehensive collections of visualizations and data analyses, often spread across multiple pages, allowing users to dive deep into their datasets. Dashboards offer a high-level overview by bringing together multiple visualizations, known as tiles, from either one report or multiple reports into a single page for quick insights. Tiles represent the individual visualizations or metrics displayed on a report or dashboard, offering a visual summary that can be quickly interpreted.

While apps are related to Power BI, they are not considered a foundational building block like the others mentioned. Instead, apps serve as a way for organizations to package and deliver Power BI content (including dashboards and reports) to a wider audience. Therefore, the correct answer highlights that apps, while useful in the Power BI ecosystem, do not constitute a foundational building block in the same context as reports, dashboards, and tiles.