What goes into utm_medium for Meta Ads — the GA4 regex that decides Paid Social vs Organic Social
The article explains how improper UTM tagging in Meta Ads can lead to misclassification of paid traffic as organic in Google Analytics 4 (GA4). GA4 uses a specific regex pattern to categorize traffic, and using utm_medium=social causes paid clicks to be logged as organic. The recommended solution is to use utm_medium=cpc to ensure accurate tracking and reporting of paid social traffic.
- ▪GA4 classifies traffic as Paid Social only if utm_medium matches the regex ^(.*cp.*|ppc|retargeting|paid.*)$.
- ▪Using utm_medium=social results in paid Meta Ads being misclassified as Organic Social traffic.
- ▪The value utm_medium=cpc is recommended because it reliably matches GA4's regex and aligns with industry standards.
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try { if(localStorage) { let currentUser = localStorage.getItem('current_user'); if (currentUser) { currentUser = JSON.parse(currentUser); if (currentUser.id === 3893127) { document.getElementById('article-show-container').classList.add('current-user-is-article-author'); } } } } catch (e) { console.error(e); } toshihiro shishido Posted on May 16 • Originally published at revenuescope.jp What goes into utm_medium for Meta Ads — the GA4 regex that decides Paid Social vs Organic Social #marketing #analytics #googleanalytics #utm "We tag Meta Ads with utm_medium=social. It's a social platform, right?" If that's been your team's convention, GA4 has been silently logging your paid clicks as organic traffic for as long as that tag has been in production.
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