# Google Ads updates its conversion lift setup rules: no GA4 imports, no GCLID-only uploads

> Google updated its Conversion Lift setup page, reported on 13 November 2026. GA4-imported web conversions are unsupported, and offline data needs hashed details.
- **Author**: Marxx
- **Published**: 2026-11-14
- **Category**: Google
- **URL**: https://marxx.ai/library-news/google-ads-conversion-lift-setup-rules-tightened

---

Google updated its help page on setting up Conversion Lift studies, reported on **13 November 2026**. The page now lists GA4-imported web conversions as unsupported and says offline uploads with only a click ID are not enough. Your study can fail if your tracking was built that way.

## What we know

[Search Engine Roundtable compared](https://www.seroundtable.com/google-ads-conversion-lift-set-up-doc-update-42530.html) the new [Google help page](https://support.google.com/google-ads/answer/12005564) with an [archived copy from 12 October 2026](https://web.archive.org/web/20261012005437/https://support.google.com/google-ads/answer/12005564?hl=en). Google made no announcement. A [conversion lift study](/glossary/conversion-lift-study) splits people into a group that sees your ads and a hold-out group that does not, to measure extra sales.

| Area | What the page now says |
|---|---|
| Web conversions | Hashed email, phone, address and transaction ID need clear rules |
| Offline conversions | A click ID alone is not enough. Use hashed first-party data |
| GA4 imports | Listed as unsupported |
| Consent | More detail for the EEA, UK and DMA cases |
| Data quality | 7 to 14 days of steady data first. Valid currency on every value |

Study length, budget and hold-out rules are mostly unchanged.

## What it means for your ad account

If you import sales from GA4 or upload only click IDs from your CRM, a lift study may not start or may give weak results. Brands with a clean tag and enhanced conversions are in better shape.

## What to do this week

1. **Check where each conversion comes from** (see [conversion tracking setup](/guides/how-to-set-up-google-ads-conversion-tracking)): the Google tag, a GA4 import or an upload.
2. **Switch GA4 imports** to Google tag conversions for the actions you want to test.
3. **Add hashed customer data** (and check [Consent Mode](/glossary/consent-mode-v2)) for your offline conversion import.
4. **Pass a value and currency** with every purchase.
5. **Collect 7 to 14 days** of clean data before you book a study.

## FAQ

### Is this a new product?

No. It is an update to the setup page for an existing tool.

### Can I still run a study with GA4 imports?

Google lists that setup as unsupported. Use tag-based conversions instead.

### Does this affect Meta lift studies?

No. It covers Google Ads only.

---
- [More Google articles](https://marxx.ai/library-news/category/google)
- [All articles](https://marxx.ai/library-news)