5 Nov 2025 · GA4 · medium severity · fix verified 9 Sept 2026
User-provided data attribution improvement
'UPD now focuses on activation and Ads Conversions, improving Enhanced Conversions and Customer Match Audiences, and ensuring more accurate attribution.'
Source: What's new archive — Nov 5, 2025.
What it breaks
Ads-imported conversions and Customer Match audience sizes step up for properties sending user-provided data; the GA4-vs-Ads gap changes shape.
Who it hits: Properties with user-provided data collection on.
The fix
Re-run the diagnoser after 5 Nov 2025; annotate the date.
fix artifact · #A-001
GA4 vs Google Ads gap diagnoser
"GA4 says 214, Ads says 391." Seven causes, ranked, with the expected size of each and what to do — three are fixes, four are definitions.
- verified_on
- 2026-09-09
- next re-check
- 2026-12-01
- status
- current
Sources linked on every entry · artifacts stamped and re-verified · ← all changes