# Run a GA4 pivot for two-dimensional questions

> Tier: recipe. Operating recipe: real tool sequence, core rules, known traps.

Pivot reports for questions shaped like X by Y, batched when several cuts are needed.

**Intent.** The two-way cut a flat report cannot show.

## When to use

- Device × channel, market × landing, any two-way question.

## When not to use

- Beyond two dimensions at once: readability collapses and thresholds bite.

## Sources

Required: Google Analytics 4

## Preconditions

- The account is ticked in the dashboard, confirmed via list_accounts.

## Inputs

- `window`: Analysis window. Default: last 30 days.

## Procedure

1. Run the pivot with the two dimensions. — tools: `ga4_run_pivot_report`
2. Batch related pivots in one call where the question needs several. — tools: `ga4_batch_run_pivot_reports`

## Decision rules

- **When** A cell result rests on tiny counts → **conclude** Mark it unjudged: pivots multiply thresholding, and small cells lie.

## Evidence requirements

- Every figure carries its account, metric and window.
- Anything below a readable sample size is reported as unjudged, not as zero.

## Human approval boundary

- The readout changes nothing. Any change it motivates goes through Safe Writes: preview, human confirmation, then apply.

## Failure modes

- Row limits truncate long tails silently: state the limit used.

## Output

- **Readout**: The figures, with windows and accounts named.
- **Flags**: What deserves a deeper skill or a human decision.