Google published a dedicated help page and diagnostics docs for multi-source conversions (beta)

Three weeks after renaming the feature, Google published a full documentation set for multi-source conversions: a main help page plus diagnostics, FAQs, tag troubleshooting and supported data sources. The beta connects an existing website conversion action to a backend source such as a CRM or order database through Data Manager or the Data Manager API.

• Google lists five benefits: recovering conversions lost to browser restrictions and ad blockers, better bidding, simpler setup through Data Manager, real-time conversion value adjustment, and supplementing the tag with user-provided email or phone.
• Real-time value adjustment is the notable capability: a CRM can send restatements, upsells or finalized totals that override the value the Google tag recorded.
• An additional data source automatically enters an initial 14-day trial period so campaigns stay stable while the setup is verified.
• Still a beta with no stated general-availability date, no published regions and no published match rates.
• The feature was renamed from "conversions with multiple data sources" to multi-source conversions in August 2026.