One typo breaks your entire attribution.
A capital letter, a space, an inconsistent campaign name — and GA4 splits the same channel into multiple sources. Manual UTM building guarantees this will happen.
"Linkedin" and "linkedin" are two different sources in GA4.
Everything must be lowercase. One capital letter silently splits the same channel in your reports and there's no warning when it happens.
Changing a campaign name mid-launch breaks the report.
utm_campaign must be locked before you share the first link. Once it changes, GA4 sees two separate campaigns and the data splits permanently.
Without a log, you can't audit or avoid reusing campaign names.
Every new link needs to be logged before it goes live. No log means no way to check if a campaign name was already used, or to reconstruct what went out and when.
One shared file. Same naming convention. Clean data from every campaign.
