Solution

In Power BI, a "Slicer" is a powerful tool for dynamically filtering data across various visuals in a report. Slicers enable users to filter data by categories (such as date, region, or product type) and apply those filters to multiple visuals simultaneously. This feature enhances interactivity and allows for easy exploration of different data subsets, making it particularly useful for business intelligence applications where users need to gain insights from large, complex datasets quickly. For instance, using a slicer for regions can instantly adjust all related visuals to show data only for the selected region. Option A (Drill Down) is incorrect as it navigates through data layers but doesn’t filter across visuals. Option B (Bookmark) is incorrect because bookmarks save views, not filter data dynamically. Option C (Measure) is incorrect as measures are used for calculations, not filtering visuals. Option E (Tooltip) is incorrect because tooltips provide additional information, not filter data.