Meta Ads glossary

What Is Event Match Quality?

Definition

Event Match Quality is Meta's diagnostic estimate of how effectively customer information sent with an event may be matched to Meta accounts.

How Event Match Quality Works

The diagnostic considers the customer-information parameters provided with browser and server events, such as hashed email, phone, external ID and browser identifiers.

A Simple Example

A Purchase event that includes correctly formatted, consented email and phone data may receive a stronger diagnostic than an event with only limited browser information.

Why Event Match Quality Matters

Better matching can improve measurement, attribution and optimization signal coverage.

Common Misreading

A high score does not prove the event itself is accurate or incremental. It can still contain the wrong value, fire twice or represent an unqualified outcome.