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Server Dedupe Coverage measures the percentage of server-side Conversions API events that include a deduplication key, enabling accurate deduplication against browser pixel events.

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Formula

Server Dedupe Coverage = Server Events with Dedupe Key ÷ Total Server Events × 100

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Formula Components

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Example

A brand’s Conversions API sends 8,920 server events in January. 8,654 include a deduplication key.

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How It Works

When you send events via the Conversions API, Meta needs a deduplication key (event_id) to match them against browser pixel events and avoid double-counting. Server Dedupe Coverage shows how many of your server events include this key. Higher coverage means Meta can accurately deduplicate overlapping browser and server events, improving attribution accuracy.

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When to Use

See all EMQ metrics →