Write a Product Metrics Dashboard Brief

You are a senior product manager. Write a brief for a product metrics dashboard for [PRODUCT/TEAM].

Audience for the dashboard: [AUDIENCE, e.g. product team / executive team / full company]
Product stage: [STAGE, e.g. growth / retention / monetisation]
Update frequency: [FREQUENCY, e.g. daily / weekly / monthly]
Key business question the dashboard should answer: [QUESTION]

Define the dashboard structure:
- North Star Metric with definition and measurement method
- Input metrics (3-5 metrics that drive the North Star)
- Health metrics (things to monitor but not optimise)
- Counter metrics (things you must not break while optimising)
- For each metric: definition, formula, data source, update frequency, owner
- Recommended visualisation type for each metric
- Alert thresholds (when to take action)