What are drill-through features in Power BI?

Drill-through features in Power BI provide a powerful way for users to explore their data more deeply. This functionality enables users to navigate from a high-level summary visualization, such as a dashboard or report, to a more detailed view that is specific to the data point they are interested in.

When a user clicks on a visual element, such as a bar or a point on a chart, the drill-through feature activates and allows them to see additional information or metrics related only to that selection. This context-sensitive navigation is crucial for data analysis, as it helps users gain insights into underlying details without cluttering the main report with all the data at once.

For instance, if you have a sales report showing total sales by region, the drill-through feature would allow you to click on a specific region to view detailed sales data for that area, including individual transactions, customer demographics, or time-series analysis. This granularity enhances the usability of reports and allows for more informed decision-making based on specific data insights.

The other options do not accurately describe the drill-through functionality. Customizing the interface, connecting to external databases, and tools for calculating KPI values do not relate to the context-based navigation capability that drill-through features provide.