Drill-down and drill-through are both interactive ways to explore data, but they work differently:
1. Drill-Down
- Lets users navigate within a visual through a hierarchy (e.g., Year → Quarter → Month).
- The visual itself updates to show more detailed levels.
- Example: Clicking a year in a sales chart to see quarterly trends.
2. Drill-Through
- Lets users open a separate report page filtered by a selected value.
- Transfers context to a detailed view without changing the original visual.
- Example: Clicking a region on the main dashboard to open a detailed page showing all sales reps and transactions for that region.
Key difference: Drill-down stays in the same visual; drill-through navigates to a separate page.
Both improve interactivity and help users explore root causes and details without cluttering the main dashboard.