The four tags that matter
- utm_source: where the click happened: google, facebook, newsletter
- utm_medium: the type of traffic: cpc, paid_social, email
- utm_campaign: the campaign name: autumn-offer
- utm_term: the ad group or keyword
Use lowercase and hyphens, never spaces. Decide the list once and share it with everyone who builds links.
A starter list
- Google Ads: source google, medium cpc
- Meta Ads: source facebook or instagram, medium paid_social
- Newsletter: source newsletter, medium email
- Partners: source the partner's name, medium referral



