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

# Understand missing data and reported metric differences

> Compare Nerve reports with platform dashboards using the same accounts, dates, metrics, attribution, and currencies, and distinguish missing data from zero.

A difference between reports can come from scope, definitions, timing, or incomplete retrieval. Compare these details before assuming the data is wrong.

## Compare like with like

1. **Account:** confirm the same platform and account or property, including manager/client context.
2. **Dates:** use identical start and end dates and check whether today is partial.
3. **Timezone:** check the reporting boundary used by each source.
4. **Metric:** compare the same conversion action, event, purchase definition, or result type.
5. **Attribution:** inspect available attribution settings and reporting timing. Platform-reported results can be updated after the original report.
6. **Currency:** keep local currencies separate unless a stated conversion method has been verified.
7. **Completeness:** check failed sources, result limits, pagination, filters, and suppressed segments.

## Missing is different from zero

A zero can be a valid measured result. A blank, dash, unavailable field, or failed request can mean the metric was not returned. Ask which applies rather than converting every missing value into zero.

```text theme={null}
Reconcile this difference for the named account and exact dates.
State the metric definition, timezone, currency, filters, and source
retrieval time you can verify. Identify incomplete requests or limits.
If the evidence cannot explain the difference, say what is missing.
Do not change measurement or campaign settings.
```

## Be careful with combined metrics

A sum of platform-reported conversions is not necessarily a count of unique customers. Reach across campaigns or platforms is not automatically deduplicated. Demographic reports can omit small segments, so their totals may differ from campaign totals.

If a mismatch persists, send [support](https://docs.nerve.mattemena.com/support-and-privacy/contact-support.md) the account names, exact dates, metric names, error text, and a cropped comparison. Remove private identifiers and avoid sharing credentials or full client reports unless needed.


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