> ## Documentation Index
> Fetch the complete documentation index at: https://docs.aloftly.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Scroll depth

> Average Clarity scroll depth.

| Contract           | Value                  |
| ------------------ | ---------------------- |
| Metric key         | `clarity.scroll_depth` |
| Source             | Microsoft Clarity      |
| Status             | active                 |
| Type               | source                 |
| Semantic version   | 1                      |
| Catalog visibility | Picker-eligible        |

## How it's calculated

```text theme={null}
value = Microsoft Clarity ScrollDepth.averageScrollDepth. Period reads use AVG, not SUM.
```

### Built from

* `project-live-insights ScrollDepth.averageScrollDepth`

## Known caveats

* Validate provider scale before cross-source comparison.
* Site Behavior session-weights snapshot averages and returns unavailable when a matching session weight is absent.

## Where this appears

* Site Behavior widget

<AccordionGroup>
  <Accordion title="Grain and identity" icon="ruler">
    daily\_snapshot; entity: traffic\_segment; same-day fold: sum; additivity: non\_additive.

    **Join and identity keys**

    * projectId
    * snapshotDate
  </Accordion>

  <Accordion title="Filters and boundaries" icon="filter">
    * Organization, store, and Clarity project are resolved server-side.
    * Reads use a half-open interval: recorded\_at >= start and recorded\_at \< end.
    * Page publication is limited to the top 100 canonical pages by sessions per snapshot.
  </Accordion>

  <Accordion title="Timezone, currency, and freshness" icon="clock">
    **Timezone.** Aloftly stamps Clarity snapshots to the previous UTC day. Initial multi-day provider windows can overlap later one-day snapshots.

    **Currency.** Not applicable.

    **Freshness.** Clarity daily sync.
  </Accordion>

  <Accordion title="Version history" icon="clock-rotate-left">
    | Date       | Change                                                         |
    | ---------- | -------------------------------------------------------------- |
    | 2026-08-03 | Bound the metric to the executable certified semantic release. |
    | 2026-07-27 | Registered Clarity behavior contracts in the semantic catalog. |
  </Accordion>
</AccordionGroup>