> For the complete documentation index, see [llms.txt](https://community.commandersact.com/customer-success/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://community.commandersact.com/customer-success/expand-your-uses/audience-and-activation/google-customer-match/3.-monitoring-and-maintenance-ensuring-the-reliability-of-the-system.md).

# 3. Monitoring & Maintenance: ensuring the reliability of the system

Once your audiences are activated, operational monitoring is essential to maintain performance and avoid errors. Google Customer Match is not a set-and-forget system: it requires proactive monitoring.

### Why is this crucial?

* Ensuring continuity of flows: avoiding blockages due to technical errors or expiry of authorisation.
* Optimise campaigns: adjust quickly in the event of a drop in the matching rate.
* Ensure compliance: verify that the data sent complies with consent.

### Best practices for effective monitoring:

#### 3.1 KPIs to monitor regularly

* Quality score: >29% (Google indicator of data quality).
* Overall matching rate: aim for >20%.
* Import error rate: <5%.
* Volume of activated audiences: check that the threshold of 1,000 profiles is reached.
* Availability time: 24 to 48 hours between sending and activation.

💡 Tip: A high error rate may indicate a format or consent issue.

#### **3.2 Set up automated monitoring**

* Destinations Monitoring in Commanders Act:
  * Track import errors.
  * View volumes sent.
* Email alerts to notify teams in case of failure.
* Import logs to analyse the causes of rejections.

#### **3.3 Check authorisations**

* Authentication tokens expire regularly.
* Recommended action: schedule a monthly check of connections between Commanders Act and Google Ads.

#### **3.4 Regular testing**

* Test segments and destinations after each change.
* Rerun a full import if there is a problem (deactivate/reactivate the destination).

**3.5 Internal documentation**

* Document:
  * The mappings used.
  * Data flows.
  * Errors encountered and their solutions.
* Objective: to facilitate maintenance and skills development for teams.

### **Direct impact:**

* Rigorous monitoring allows you to:
* Maintain high matching rates.
* Avoid audience loss.
* Ensure GDPR compliance.

💡 Tip: Integrate KPI tracking into your CRM or media dashboards for a consolidated view.