Is Google Ads AI Max worth it? What it does, what tests found, and how to turn it off

Is Google Ads AI Max worth it?

By Andrej Ruckij · November 5, 2026 · product facts checked on Google’s own help pages the same day

TL;DR: Sometimes, and less than Google’s numbers suggest. AI Max is a layer on top of a normal Search campaign: broad match plus “keywordless” matching, Google-written ad text, and Google choosing the landing page. Google says advertisers typically see 14% more conversions or conversion value at a similar CPA. Independent tests are cooler: SMEC’s 250+ campaigns showed a median 13% lift in conversion value with CPA up 16%, and Brainlabs found about 3% real incremental uplift in accounts already heavy on broad match. It’s worth testing if your campaigns are mostly exact and phrase match, use conversion-based Smart Bidding and aren’t limited by budget. It’s a poor fit for brand campaigns, compliance-pinned ad copy and small budgets. It is now on by default in new Search campaigns, so check whether you’re already using it.

What AI Max actually is

Google describes it plainly: “AI Max isn’t a new campaign type but an optimization layer within existing Search campaigns” (Google Ads Help). It has three parts (Google for Developers):

Search term matching, which “uses Google AI, including broad match and ‘keywordless’ technology” to show your ads on searches you didn’t add as keywords.
Text customization, where Google writes headlines and descriptions from your site and ads. They’re marked “Google AI” in the “Added by” column (Google Ads Help).
Final URL expansion, where Google picks the landing page on your site it thinks fits the search best. It needs text customization switched on.

It matters now for a few reasons:

On by default. “New Search campaigns have the AI Max feature turned on by default” (Google Ads Help).
It replaces older features. AI Max takes over from Dynamic Search Ads, automatically created assets and campaign-level broad match. Dynamic Search Ads campaigns “will automatically be upgraded to AI Max” starting in February 2027 (Google Ads Help, Google blog).
AI Brief is coming: a way to steer AI Max in plain language, with messaging, matching and audience guidelines. It’s still in closed beta, expanding to more languages (Google blog, PPC Land).

What Google claims, and what it compares against

Google has published three different numbers, and they measure different things:

+14%: “will typically see 14% more conversions or conversion value at a similar CPA/ROAS”, from Google’s internal data for non-retail advertisers in 2025 (Google blog).
+27%: “the typical uplift is even higher at 27%” for campaigns that mostly use exact and phrase match keywords (same source).
+7%: “an average of 7% more conversions or conversion value at a similar CPA/ROAS” for the full feature suite, compared with search term matching on its own, not compared with no AI Max at all (Google blog).

All three come from Google, measured on Google’s terms. “At a similar CPA” is the part to test.

What independent tests found

SMEC, 250+ Search campaigns (measured; SMEC is an agency): “Median revenue uplift: +13% conversion value” and “Median CPA increase: +16%”. Return on ad spend ranged from 42% above to 35% below baseline, and only 22% of campaigns landed near their ROAS target. In two accounts, AI Max overlapped with existing broad-match queries by 49% and 63% (Search Engine Journal). SMEC’s Mike Ryan calls it “very much a rebrand of basically the campaign-level broad match recommendation” (PPC Land).
SMEC, 383 million impressions in EMEA ecommerce (measured): by July 2026, AI Max had taken over about 29% of the impressions that exact-match keywords used to get (PPC Land).
Brainlabs, 23 tests across 16 mature advertisers over nine months (measured; read through a summary because the original was blocked): “+7% conversion value from never-targeted queries”, but “54% of those queries were already captured by other campaigns”, leaving “real incremental uplift” of “~3% for accounts already running high broad match” (summary of Brainlabs’ study).
Advance Metrics (small test, account count not given): AI Max delivered “clear performance improvements” in about a quarter of test accounts, while around 75% lagged or showed no meaningful improvement (Advance Metrics).
Monks (small test, about 30,000 search terms from a few clients): “99% of impressions have 0 conversions” (PPC Land).

My read: AI Max finds some new conversions, mostly at a higher cost, and much of what looks new was already being bought by your other campaigns. Judge it on the whole account, not on the AI Max campaign’s own dashboard.

AI Max vs Performance Max vs broad match

	What it does	Who controls the copy and landing page
Broad match keywords	Matches related searches to your keywords	You
AI Max	Broad match plus keywordless matching, inside a Search campaign	Google can rewrite text and pick the landing page, unless you switch those parts off
Performance Max	One campaign across Google’s channels	Mostly Google

When AI Max and Performance Max both match a search, “the one with the highest Ad Rank will serve” (Google Ads Help). Note that broad keywords aren’t treated as exact matches for priority, so if you rely on exact match winning, add exact-match copies of those keywords (Google Ads Help).

On AI Mode: you don’t need AI Max to appear in Google’s AI answers. AI Max, broad match, Shopping and Performance Max are all eligible for matching on the AI response, while exact and phrase match aren’t eligible for broader exploratory questions (Google Ads Help).

How to turn AI Max on or off

From Google’s help pages (turn on, features):

Check a campaign: Campaigns > Settings, open the campaign and look for “AI Max”.
Turn it off: Campaigns > Settings tab, select the campaigns, AI Max, switch it off, Save. “When turned off, all of the AI Max features will be disabled” (Google Ads Help), and switching it back on restores your earlier settings.
Per feature: search term matching switches off per ad group; text customization and final URL expansion per campaign.
Test it properly: use Google’s “AI Max experiments” from the Experiments page. Google lists campaign setups that block an experiment, including portfolio bidding and shared budgets, so check the list on its help page first (Google Ads Help).

What goes wrong, and how to check

It spends on your competitors’ brand names. In one campaign, data from Smarter Ecommerce’s Mike Ryan showed competitor brand terms making up 69% of impressions, and he cautioned it may not be typical (Lunio, which sells click-fraud tools). Check: build a brand list under Tools > Shared library > Brand lists and apply it as a brand exclusion (Google Ads Help). A newer setting to show ads only on unbranded searches is in limited rollout (PPC Land).
It competes with your own campaigns. The 49-63% overlap and Brainlabs’ 54% already-captured figure above. Check: compare total account conversions and cost before and after, not the AI Max campaign alone.
The search terms report undercounts it. Filtering for match type “AI Max” “may show lower numbers” because it doesn’t include “Other search terms” (Google Ads Help), and Google’s API docs say never to add up the two reporting views (Google for Developers).
It sends people to the wrong page or breaks tracking. Without {lpurl} in your tracking template, users can land on the static URL, and nonstandard placement “can cause 404 errors” (Google Ads Help). Check the landing pages report’s “Selected by” column, and add URL exclusions under Final URL expansion (Google Ads Help).
Pinned ad copy stops being respected. With final URL expansion on, “pinning of RSA assets will not be respected”; Google’s own advice is that if pinning is a necessity, don’t use final URL expansion or URL inclusions (Google Ads Help).

How to decide

AI Max is worth a test if all of these are true:

You use conversion-based Smart Bidding. Search term matching “will not work with manual CPC bidding” (Google Ads Help).
The campaign isn’t limited by budget. “AI Max won’t be effective if campaigns are limited by budget” (Google Ads Help).
The campaign is mostly exact and phrase match, where Google’s own claimed upside is largest.
You get enough conversions to read a result. No source gives a number; Advance Metrics says a few conversions a week isn’t enough.
Your ad copy and landing pages don’t need to be controlled word for word for legal or compliance reasons.

Skip it, or keep it off, for:

Brand campaigns. There’s nothing to expand into, only competitor names.
Accounts already heavy on broad match or Dynamic Search Ads, where the real gain may be around 3%.
Regulated categories with pinned copy.

What I’d do this week

Check whether you’re already on it. Open Campaigns > Settings and check AI Max on every Search campaign created recently, because it’s on by default. 10 minutes.
Add brand exclusions and URL exclusions before anything else, so it can’t bid on competitor names or send people to blog posts and careers pages.
Run it as an experiment, not a switch. Use the AI Max experiment on one exact- and phrase-heavy campaign. Don’t change it for at least two weeks; Advance Metrics suggests eight weeks of runtime.
Judge on the whole account’s conversions and cost, and review the search terms every week or two.

Gaps in what I could check

Google’s AI Brief pages didn’t load for my tools, so its description comes from Google’s blog plus PPC Land. Search Engine Land’s articles on the SMEC and Brainlabs studies were blocked, so Brainlabs is quoted from a summary. I found no measured data on off-brand ad text from text customization, and no Google help page yet for the unbranded-search setting.

Sources

https://t.me/aidaily_business