In the first week of October 2026, Google Ads shipped three things worth a marketer's attention: self-serve Conversion Lift for Search and Performance Max, a beta Target ROAS calculator driven by profit margin, and a preview of AI Max text customization. Together they push advertisers toward incrementality and margin thinking. Here is what each does, its limits, and what to do this week. Data as of 9 October 2026.
Key Takeaways
- Conversion Lift for Search and PMax no longer needs a Google rep, but requires at least 1,000 observed conversions and a $5,000 minimum campaign budget (Search Engine Land, 7 October 2026).
- Google Ads is testing a Target ROAS calculator that converts an average profit margin into a suggested target; it is spotted in beta and not confirmed as widely available.
- The calculator converts margin into a ROAS number. It does not optimise bids for profit directly.
- A 8 October AI Max update reportedly lets advertisers preview AI-generated headlines and descriptions before enabling text customization (single secondary source).
- Legacy broad match and automatically created assets are being moved to AI Max; sources conflict on the DSA timeline, so check your account notices.
- Small accounts below the thresholds should use geo or time-based holdouts instead.
Conversion Lift opens to Search and PMax
Search Engine Land reported on 7 October 2026 that Search and Performance Max join Display, Video, Demand Gen and App as supported campaign types for user-based Conversion Lift studies. Previously, Search and PMax advertisers needed a Google representative for access (Search Engine Land). Search Engine Roundtable confirms Google updated its help page on 8 October (Search Engine Roundtable).
The eligibility rules
- At least 1,000 observed conversions, excluding conversions using supplementary data.
- Minimum campaign budget of $5,000 USD.
- At least one Conversion Lift-compatible conversion action.
- A campaign can sit in only one study at a time (Brand Lift, Search Lift or Conversion Lift).
- iOS-targeted App campaigns and Travel Ads are not supported.
No rollout schedule was given, and Google's documentation says availability can vary by account (Google Ads Help).
How Conversion Lift works, in plain English
It creates a holdout group that is not shown the measured campaigns, then compares its behaviour with users who could see the ads. The difference estimates incremental conversions, not just those attribution models credit. A bigger holdout gives a better sample but withholds ads from more people. Google also documents a Bayesian methodology for these studies (Google Ads Help).
Should you run one?
Run it if branded search or retargeting-heavy PMax is eating budget and you suspect much of it would convert anyway. Skip it if you cannot hit 1,000 conversions in the study window, or if you plan to change bids and budgets mid-test, because that muddies results. In my experience on edtech lead gen, the commonest fix after a lift test is not "turn it off" but "move spend from branded to prospecting", and that is a hypothesis to test, not a result I can quote.
Target ROAS from profit margins
Search Engine Land (6 October 2026) says Google Ads is testing a Target ROAS calculator. You enter an average profit margin excluding ad spend, and it computes a target assuming conversion value equals revenue. Its example: a 15% margin gives a 667% Target ROAS at breakeven, about $6.67 revenue per $1 of ad spend. It also shows weekly estimates for clicks, revenue, spend and profit, and a beta option asks questions to estimate margin if you don't know it (Search Engine Land).
The maths is simple: breakeven ROAS = 1 / margin. At 25% margin that is 400%. Anything below is a loss before overhead.
The caveats worth repeating
- Average margin hides product mix. A 60% margin course and a 10% margin bundle should not share a target.
- Shipping, returns, payment fees and overhead change true profit.
- Conversion value must really be revenue; if you pass lead values or LTV guesses, the output is meaningless.
- It is a calculator, not profit bidding.
The article doesn't say which accounts have it, so you may not see it yet.
AI Max: where the account is heading
AI Max for Search is out of beta. Google's announcement says Dynamic Search Ads, automatically created assets and campaign-level broad match are being upgraded to it, and cites an average 7% more conversions or conversion value at similar CPA/ROAS for campaigns using all three features. That is a vendor-reported figure (Google Ads blog).
Timelines differ between sources. Search Engine Land lists broad match and ACA campaigns migrating 1 to 30 September 2026 and DSAs automatically migrating 1 to 28 February 2027 (Search Engine Land), while Google's blog says legacy settings upgrade automatically from September. I can't reconcile them from what I opened, so check the notices in your own account.
The 8 October preview
A blog post credited to Hana Kobzova's sharing says advertisers can now preview up to ten AI-generated headlines and descriptions about 30 seconds after entering a final URL, before turning on text customization, under Asset optimization (Adriaan Dekker). This is a single secondary source, so verify in the UI. If true, it is the first practical way to audit what Google would say on your behalf before it goes live.
What organic teams should take from this
Paid is moving toward automation plus measurement. The organic parallel: landing pages that AI-written ads send people to must match the claim. If an auto-generated headline promises "free demo" and your page is gated, you pay for the bounce. Use the Final URL expansion exclusions and align with SEO on page inventory. For how ads are creeping into AI results, read my post on ads in AI Mode.
This week's checklist
- Check conversions in the last 30 days for each Search and PMax campaign against the 1,000 threshold.
- If eligible, write the hypothesis before you start the study ("branded search drives X% incremental").
- Calculate breakeven ROAS by product line from real margins. Use the Google calculator only if you have it.
- Read your account's AI Max notices; screenshot the dates.
- Use the preview, if you see it, to pull a list of risky claims for brand guidelines.
- Agree who owns landing-page changes.
Unverified items
As of 9 October 2026: the margin calculator's availability, the AI Max preview (single blog source), and the DSA migration date conflict are unresolved. I did not open the full Google Ads Help text for every threshold; the numbers come from Search Engine Land and Search Engine Roundtable.
Putting margin maths into practice
Take two products. A cohort course at 40% margin has breakeven ROAS of 250%. A self-paced bundle at 20% margin has breakeven of 500%. If both sit in one campaign with a single 300% target, the bundle quietly loses money while the course looks fine. Splitting asset groups or campaigns by margin band is dull but effective. Then use Conversion Lift to ask whether the campaign's incremental conversions justify the spend, and use the calculator, if you have it, only as a sanity check on your own numbers. Document the margin source (finance, not a guess) in the account notes so the next person can audit it.
Where AI Max fits the same discipline
AI Max expands the queries and URLs Google can use. That helps reach, and it also means your negative lists, brand guidelines and landing-page inventory matter more. Keep a weekly search-terms review for the first month after any migration. If a new query bucket brings volume but weak lead quality, exclude it and note the date. The same logic applies to the Display-to-Demand Gen move that Search Engine Land covers: export exclusions and audiences first, because the migration is not reversible (Search Engine Land).
FAQ
What is Conversion Lift in Google Ads?
It is a study that holds out a group of users from seeing your campaigns and compares their conversions with exposed users, estimating incremental conversions rather than attributed ones.
Can small advertisers use it?
Not through the self-serve route. Reports say you need 1,000 observed conversions and a $5,000 minimum campaign budget.
Does it work for Search and PMax now?
Yes, per Search Engine Land (7 October 2026) and Search Engine Roundtable (8 October). Availability can vary by account.
How does the margin-based Target ROAS calculator work?
You enter average profit margin excluding ad spend, and it suggests a Target ROAS assuming conversion value is revenue. In Search Engine Land's example, a 15% margin gives roughly 667%.
Does Google then optimise for profit?
No. The article says Google isn't directly optimising bids for profit, only converting margin into a suggested target.
What is AI Max?
It is Google's AI-powered set of features for Search campaigns, including search term matching, text customization and final URL expansion.
Is AI Max mandatory?
Google is migrating legacy broad match, automatically created assets and DSAs into it. You may still choose timing; check your account notices.
Is the 7% uplift guaranteed?
No. It is a Google-reported average for campaigns using all three features, not a promise for your account.
What should I test first?
Run a Conversion Lift study on your highest-spend branded or retargeting-heavy campaign if you meet thresholds.
Want paid and organic planned together?
I'm Younus Fardeen, an organic growth, SEO and AEO strategist with 4+ years of marketing experience across edtech and startups. If you want landing pages and measurement that work with, not against, automated ads, see my work and write via the contact form at https://younusfardeen.in.