KPI · Move lower
Scroll-depth drop-off
Concentrated loss of users at a scroll depth, snap boundary, pinned scene, false ending, or loading sentinel.
Scroll-depth drop-off shows where users stop progressing through a page. In a scrolljacking audit, the important shape is not only how deep users go, but whether they leave at the exact point where scroll behavior changes.
Track depth by meaningful sections, not just percentages. Mark snap boundaries, pinned scenes, lazy-load sentinels, and false endings so the drop-off can be traced to a concrete interface behavior.
How patterns use this KPI
| Pattern | How it's instrumented | Why it matters there |
|---|---|---|
| Scrolljacking | Scroll-depth distribution with attention to snap boundaries, pinned scenes, false endings, and loading sentinels | Sharp drop-offs reveal where scroll effects or hidden continuation interrupt discovery. |