The count of customer identifier fields (email, phone, etc.) that have data quality problems affecting Meta matching.
Match Key Issues = COUNT ( Match Keys with Identified Issues )
| Metadata | |
|---|
| Type | Number |
| Data Source | Meta Ads |
| Aggregation | Count |
Example
Your pixel has 3 match key issues flagged by Meta this week:
| Match Key | Issue | Impact |
|---|
| Email | Invalid format detected | High |
| Phone | Missing country codes | Medium |
| External ID | Inconsistent hashing | Low |
How It Works
Meta analyzes each customer identifier field you send with conversion events and flags issues that reduce matching accuracy. Common problems include invalid email formats, phone numbers without country codes, unhashed data, or inconsistent formatting across events.
When to Use
| Scenario | Action |
|---|
| Issue count increased | Review recent implementation changes to customer data capture |
| Persistent high count | Audit data validation before sending events to Meta |
| Count dropped to zero | Confirm fixes resolved issues; monitor for regressions |
| New issue appeared | Check the specific match key field for formatting or collection problems |
| Metric | Relationship |
|---|
| Diagnostics Count | Total diagnostic issues (Match Key Issues is a subset) |
| Match Key Coverage | Coverage percentage for each identifier type |
