What is the primary purpose of using drillthrough in Microsoft Power BI?

The primary purpose of using drillthrough in Microsoft Power BI is to enable users to navigate from a specific data point or visual in a main report to a detailed report page. Drillthrough creates a direct pathway that allows users to explore deeper insights related to a specific segment of data, thereby enhancing the interactivity of the report. This feature is especially valuable when users need to analyze detailed information while maintaining context from the main visualization.

For example, if a user is examining sales data by region, they can use drillthrough to click on a particular region and be transported to a detailed report page that contains more granular data specific to that region, such as sales by individual stores or product categories. This seamless transition facilitates a more thorough exploration of data, allowing for better analysis and decision-making.

In contrast to other options, drilling down refers to exploring hierarchical data within the same visual rather than navigating to a new report page. An option that suggests changing data orientation in a table does not relate to the navigation feature, and creating hierarchies pertains more to organizing data fields rather than the act of navigating to detailed reports. Hence, the focus on detailed report access through specific data points makes navigating with drillthrough an essential and powerful feature in Power BI.