On April 15, 2026, Google announced that every remaining Dynamic Search Ads campaign will auto-upgrade to AI Max for Search in September. From that point, DSAs can no longer be created in the Google Ads UI, Editor, or API. Independent analysis of 250 AI Max campaigns found the median result was +13% revenue at +16% higher CPA, and 84% of advertisers saw neutral or negative results. Whether your WooCommerce store lands in the winning 16% comes down to one question Google is not advertising: is your conversion signal clean enough for the algorithm to train on?
A 4-5 Month Window to Audit Your Conversion Data
This is not a new campaign type. AI Max for Search is the absorption of three legacy features into one AI layer: search term matching (broad match expansion plus keywordless targeting), text customization (AI-generated headlines from your landing pages), and final URL expansion (automated landing page selection). It replaces Dynamic Search Ads, Automatically Created Assets, and campaign-level broad match. If any of those settings touch your campaigns right now, you are migrating — the only question is whether you do it on your own terms before September or Google does it for you.
Google’s internal data shows AI Max delivers an average of 7% more conversions or conversion value at similar CPA when the full feature suite is active. The independent numbers tell a different story. Smarter Ecommerce analysed 250 AI Max campaigns and found a median uplift of +13% revenue — but at a +16% higher CPA, meaning most advertisers bought growth rather than earning it. That is a long way from the 27% lift Google’s announcement blog leads with.
The reason for the gap is not mystery. It is signal quality. Google is very good at optimising when it has clean, complete data to optimise against. It is very bad at telling you when your data is not clean enough — it just runs anyway. We covered the mechanics of this failure in our earlier piece on why AI Max underperforms on incomplete data. This article is the deadline-driven sequel: what to actually audit before September.
What AI Max Does Differently (And Why It Punishes Bad Data)
Three behaviours make AI Max unforgiving of incomplete conversion data.
First, query expansion is aggressive by default. One documented deployment saw AI Max consume 69% of total Search impressions against competitor brand terms before the advertiser caught it. The algorithm tests queries your keyword list never authorised, and it keeps testing them until your conversion data tells it to stop. If your conversion data is missing 20-30% of the ground truth, the “stop” signal never arrives loudly enough.
Second, AI Max needs volume. Google’s documentation and independent implementation guides both point to the same threshold: 100+ monthly conversions per campaign for reliable signal. That is double the 50/month threshold Smart Bidding already struggles with. If your WooCommerce store is stuck in Smart Bidding’s learning phase today, AI Max will make that problem worse, not better.
Third, AI Max treats Enhanced Conversions as near-mandatory in practice. The algorithm leans on hashed email and phone signals to close the loop on users whose pixel fired but whose cookie expired or was blocked. If Enhanced Conversions is configured but not actually receiving first-party data, AI Max runs blind on exactly the segment where your signal gap is widest.
The 5-Point WooCommerce Pre-Migration Audit
Here is what to check before September.
1. Calculate your conversion completeness ratio
Take a 30-day window. Divide Google Ads reported conversions (paid-search traffic only) by actual WooCommerce orders attributed to paid search. The target ratio is 0.90 or higher. Most stores running browser-side tracking land at 0.70-0.80 — the Tracklution 2025 benchmark puts it at 70-80% reporting for the typical WooCommerce setup. If your ratio is below 0.90, nothing else on this list matters until you fix it.
2. Verify Enhanced Conversions is actually firing
The Diagnostics tab in Google Ads shows whether Enhanced Conversions is receiving email, phone, and address data. “Configured” and “receiving data” are different states. Ninety percent of store owners who report Enhanced Conversions as “enabled” have it configured but not delivering first-party fields from every order. This is exactly the browser-pixel timing failure we documented for WooCommerce: the pixel fires, but the customer data lands at the wrong layer of the DOM, and Enhanced Conversions silently runs on empty.
3. Check each campaign against the 100 conversions/month threshold
Not 50. Smart Bidding’s learning-phase threshold is 50/month. AI Max wants 100+. Campaigns below the threshold are not just suboptimal under AI Max — they are structurally unable to generate enough training signal for the algorithm to improve. Consider consolidating below-threshold campaigns before the migration rather than after.
4. Audit your negative keyword list
AI Max expands queries in ways your DSA campaigns never did. If your negatives were good enough for DSA, they are probably not good enough for AI Max. Pull the last 90 days of search term reports, flag anything close to competitor names or unrelated categories, and add them before the algorithm discovers them at full budget.
You may be interested in: Google Forced Your WooCommerce Store Onto Smart Bidding. Your Conversion Data Is Not Ready.
5. Decide: voluntary now or forced September
If your completeness ratio is already above 0.90, migrate now. You get the 4-5 month window to tune query reports, adjust creatives, and see results on your terms. If your ratio is below 0.90, treat the next four months as a data-quality project, not a campaign project. Every week of improvement before September is a week of cleaner signal AI Max will train on from day one.
How Transmute Engine™ Closes the Signal Gap
Transmute Engine is a first-party Node.js server that runs on your own subdomain (e.g. data.yourstore.com), captures every WooCommerce order directly from the server-side checkout hook, and delivers a complete conversion signal to Google Ads Enhanced Conversions — along with GA4, Facebook CAPI, and BigQuery — in parallel. Because the event is authored on the server rather than in the browser, ad blockers, Safari ITP cookie limits, and thank-you page race conditions stop mattering. Completeness ratios above 0.95 are the norm, not the exception. That is the state you want your store in before September.
Key Takeaways
- September 2026 is a hard cutoff. Every DSA, Automatically Created Assets, and campaign-level broad match campaign auto-migrates to AI Max on Google’s timeline, not yours.
- The 0.90 completeness ratio is the migration prerequisite. Below that, AI Max optimises against a distorted sample of your real customers.
- 100 conversions/month is the AI Max threshold, not the 50 of Smart Bidding. Consolidate small campaigns before migration.
- Enhanced Conversions must be delivering data, not just configured. Check the Diagnostics panel for actual field delivery.
- 84% of advertisers see neutral or negative results under AI Max. The 16% who win are the ones whose conversion signal was clean before they migrated.
Frequently Asked Questions
Every remaining DSA campaign, every campaign using Automatically Created Assets, and every campaign-level broad match setup will automatically upgrade to AI Max for Search. You cannot create new DSA campaigns after September via the Google Ads UI, Editor, or API. Existing campaigns migrate in place, keeping history and budget but inheriting AI Max’s search term matching, text customization, and final URL expansion.
Voluntary migration is safer if your conversion signal completeness ratio is already above 0.90 and you have 100+ monthly conversions per campaign. It gives you time to audit query reports, add negative keywords, and adjust creative before AI Max expands reach on its own terms. Wait only if your conversion tracking is incomplete — every week before you fix that is a week of bad signal AI Max will train on.
Yes. AI Max amplifies whatever signal you feed it. If your browser-side tracking is already missing 20-30% of orders due to ad blockers, Safari ITP cookie limits, and thank-you page race conditions, AI Max will optimise against a distorted sample of your real customers. The 84% of advertisers who see neutral or negative results are disproportionately those with incomplete conversion data feeding the algorithm.
Technically no, but practically yes. Google’s own documentation lists Enhanced Conversions as a recommended prerequisite, and independent implementation guides treat it as non-negotiable. Without Enhanced Conversions feeding hashed email and phone data, AI Max cannot close the attribution loop for users who block pixels or clear cookies — which is exactly where the 20-30% signal gap lives on WooCommerce.
Run the conversion completeness ratio check: divide Google Ads reported conversions by actual WooCommerce orders over the same 30-day window (filtered to paid-search traffic). If the ratio is below 0.90, your store is not ready. Also verify your campaigns exceed 100 monthly conversions, Enhanced Conversions is receiving email and phone data in the diagnostics panel, and your negative keyword list accounts for broader query expansion.
You have until September. Run the completeness audit this week — see seresa.io for the server-side path that gets your WooCommerce signal above 0.90 before the forced migration.