> 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.md).

# Google Customer Match

Google Customer Match (GCM) is a powerful tool for activating custom audiences based on CRM data (emails, telephone numbers, postal addresses). To get the most out of it, data quality and operational monitoring are essential. Here are some best practices to follow.

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[1. Data quality: the foundation of success](/customer-success/expand-your-uses/audience-and-activation/google-customer-match/1.-data-quality-the-foundation-of-success.md)
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[2. Optimise the matching rate](/customer-success/expand-your-uses/audience-and-activation/google-customer-match/2.-optimise-the-matching-rate.md)
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[3. Monitoring & Maintenance: ensuring the reliability of the system](/customer-success/expand-your-uses/audience-and-activation/google-customer-match/3.-monitoring-and-maintenance-ensuring-the-reliability-of-the-system.md)
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[4. Technical issues to anticipate & common errors](/customer-success/expand-your-uses/audience-and-activation/google-customer-match/4.-technical-issues-to-anticipate-and-common-errors.md)
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[5. Strategic recommendations & next steps](/customer-success/expand-your-uses/audience-and-activation/google-customer-match/5.-strategic-recommendations-and-next-steps.md)
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