Google has launched an update for GA4, reducing the required fields needed to import external cost data into the platform.
Moving forward you will only need the following fields:
- Source
- Medium
- Date
Historically, you also needed to import campaign_name and campaign_id, and where this data is available, Google recommends importing them as key fields as they will assist in more granular reporting from within GA4. When cost data is imported without them, GA4 will report in aggregate for those dimensions if requested.
