Event Quality Score
An event quality score is the grade an ad platform gives an event payload for completeness - how many of the fields the platform needs for matching, attribution, and optimization the event actually carried. A delivered event is not the same as a useful event: platforms accept thin events and then tell you, in their own scoring language, how much of the payload went to waste.
How each platform reports it
| Platform | Score | Where |
|---|---|---|
| Meta | Event Match Quality (EMQ), 0-10 per event, web events only | Events Manager |
| Event Quality Score (EQS), with "Good" as the stated onboarding target | Events Manager validation step | |
| Warnings, not a number | Events Manager event-testing view | |
| Snapchat | Warnings, not a number | Test Event responses |
Meta grades how effective the customer information parameters you sent are at matching the event to real accounts - but publishes no per-field weights and no target number, so a guide naming a specific target score is inventing one. Pinterest's onboarding guidance is stated as a goal: pass data in a way that sets the integration up for a "Good" EQS. Reddit and Snapchat accept events with malformed-but-recognizable values and answer with warnings - each warning is a match key working below strength.
What moves the score
The score is downstream of the payload: richer correctly-normalized identifiers, the platform's click ID passed through, and complete event fields push it up, while double-hashed or raw values drag it down silently. The score and match rate move together - one grades the payload, the other counts the matches. The Meta-specific improvement moves are broken down in the Event Match Quality guide.