Metrics

Event Match Quality

Meta's score (0-10) measuring how well your conversion events can be matched to Meta user profiles, critical for attribution accuracy.

Event Match Quality (EMQ) is Meta's rating of how much customer data you're sending with each conversion event. Score of 7.0+ is good, 8.0+ is excellent. Higher scores = better attribution and ad optimization. Meta matches events to user profiles using: email (hashed), phone number, Facebook click ID (fbp/fbc), IP address, user agent, and other identifiers. More parameters = higher match rate. Low EMQ (<5.0) means Meta can't match most conversions to ad clicks, breaking attribution. This causes: under-reported conversions, poor ad optimization, and wasted budget. CAPI typically achieves higher EMQ than Pixel alone because server-side tracking can capture email/phone from checkout forms. Check EMQ in Meta Events Manager. Improve by: implementing CAPI, sending hashed email/phone, including fbp/fbc parameters, and ensuring user_data object is complete.

Related Terms

External Resources

Event Match Quality

Frequently Asked Questions

What is Event Match Quality (EMQ)?

Event Match Quality (EMQ) is a score, typically ranging from 0 to 10, provided by advertising platforms like Meta to measure how effectively your conversion events can be matched to their user profiles. A higher score, generally 7.0 or above, indicates better data quality and a greater ability for the platform to accurately attribute conversions to ad interactions and optimize ad delivery. The score is determined by the amount and quality of customer data sent with each conversion event, such as hashed email addresses, phone numbers, IP addresses, and the Facebook click ID (fbp/fbc). A high EMQ is critical because it ensures the advertising platform has the necessary data to close the loop between an ad view or click and a subsequent conversion, leading to more accurate reporting and more efficient ad spend. Low EMQ can result in under-reported conversions and poor ad optimization.

How can I improve my Event Match Quality score?

To significantly improve your Event Match Quality (EMQ) score, the most effective strategy is to implement server-side tracking, such as the Meta Conversions API (CAPI), in addition to the standard browser pixel. Server-side tracking allows you to capture and send more comprehensive customer data, including hashed email and phone numbers, directly from your server. This bypasses browser limitations like ad blockers and iOS tracking restrictions, which often degrade the quality of data sent by the browser pixel alone. You should also ensure that you are consistently sending all available user data parameters, including the Facebook click ID (fbp/fbc) and user agent, with every event. Finally, regularly check your EMQ score in the platform's Events Manager to monitor performance and identify any data gaps that need to be addressed. A score of 8.0 or higher is considered excellent and will maximize your ad platform's optimization capabilities.

Why is Event Match Quality more important than the number of conversions reported?

Event Match Quality (EMQ) is more important than the raw number of conversions reported because it is a measure of **data reliability** and **causal accuracy**, which directly impacts the platform's ability to optimize your ad spend. A high number of reported conversions with a low EMQ means the platform is essentially guessing at the attribution for a large portion of those events, leading to unreliable data for bidding and targeting. Conversely, a high EMQ ensures that the platform can confidently link a conversion back to a specific user and ad, providing the accurate feedback loop necessary for the ad algorithm to find more high-value customers. Focusing on EMQ ensures that the conversions you are reporting are actually being used effectively by the ad platform to drive incremental results, preventing budget waste on campaigns that appear successful but are based on poor-quality, unmatched data.

Want accurate attribution without the complexity?

Causality Engine automates attribution reconciliation and provides real-time insights for Shopify brands.

Join Waitlist →