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Browser Dedupe Coverage measures the percentage of browser pixel events that include a deduplication key, preventing double-counting when browser and server events overlap.

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Formula

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

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Formula Components

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Example

A brand’s pixel fires 12,450 browser events in January. 11,830 include a deduplication key.

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How It Works

When both your browser pixel and Conversions API send the same event, Meta needs a deduplication key (event_id) to recognize them as one conversion rather than two. Browser Dedupe Coverage shows how many of your browser events include this key. Higher coverage means more accurate conversion counts and better attribution.

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When to Use

See all EMQ metrics →