Starting 1 September 2026, Google began automatically migrating campaign-level Broad Match and legacy Automatically Created Assets (ACA) campaigns over to AI Max. It’s rolling out gradually across the month — no action required on your end for it to happen. Which is exactly the problem. Most advertisers won’t touch a single setting and will just wake up one day running a different kind of campaign than the one they built. Most small businesses never actually decide to use it — they just wake up running it, because nobody unchecked the box.
Here’s what’s actually changing — and, more usefully, what’s worth pulling up in your own account this week.
What Is Google AI Max, Actually?
AI Max sits on top of your standard Search campaigns as an automation layer. Rather than only matching ads to keywords you’ve explicitly bid on, it goes looking for extra reach — pulling signals from your landing page content, your existing keyword themes, whatever assets it’s generated on its own. Really, it’s two older tools merged into one: campaign-level Broad Match (the keyword-expansion side) and Automatically Created Assets, or ACA (the semi-automated headline generator advertisers have leaned on for years).
Folding both of those into a single AI Max experience isn’t a small tweak. It changes how your account decides which searches your ads show up for, and hands more of that decision to the algorithm than most advertisers are used to.
Why Now — The Full Timeline
| Date | What Happens |
| 3 August 2026 | Google closes the door on creating new campaign-level Broad Match and ACA entities across the UI, Google Ads Editor, and the API. |
| 1 September 2026 | Automatic migration of existing campaign-level Broad Match and legacy ACA campaigns to AI Max begins, rolling out gradually through the month. Brand inclusion and exclusion lists carry over. |
| September 2026 | In-account notices start appearing, nudging advertisers to voluntarily upgrade Dynamic Search Ads (DSA) campaigns ahead of the mandatory shift. |
| February 2027 | Automatic DSA migration to AI Max goes into effect. Creating new DSA ad groups is retired permanently from this point on. |
This isn’t an isolated change. It’s part of the same shift we’ve been tracking through Google’s May 2026 Core Update (https://searchenginecore.com/google-just-dropped-its-may-2026-core-update-heres-whats-actually-going-on/) and the March 2026 Core Update (https://searchenginecore.com/google-march-2026-core-update-rolled-out-winners-losers-what-it-means-for-seo/) before it — less manual control handed to advertisers, more algorithmic judgment calls made on their behalf by default.
Broad Match + ACA vs. AI Max, at a Glance
| Broad Match + ACA (Old) | AI Max (New Default) | |
| Matching logic | Keyword-based broad matching, advertiser-controlled | Signal-based matching, including landing page content |
| Ad assets | Semi-automated (ACA suggests, you approve) | AI-generated by default, still editable |
| Who decides reach | You set the match type explicitly | Google expands automatically unless you restrict it |
| New campaign creation | Retired 3 August 2026 | Default option since |
What Carries Over Automatically vs. What Needs Your Eyes
| Carries Over Automatically | Worth Rechecking Yourself |
| Brand inclusion and exclusion lists | Negative keyword coverage — AI Max broadens reach, so gaps get more expensive |
| Existing budgets and bid strategies | Landing page content, since it now directly feeds ad asset generation |
| Historical campaign performance data | Search terms reports — matching behaviour shifts, so last month’s patterns won’t predict this month’s |
| Campaign structure and naming | AI-generated headlines and descriptions, before they run at scale |
5 Things to Check in Your Account This Week
- Confirm your brand exclusion lists actually migrated correctly. Google says they carry over, but a manual spot-check takes two minutes and catches the rare cases where they don’t.
- Pull your search terms report and set a weekly recheck for the next month. Matching behaviour is shifting under you, so the queries triggering your ads today may look different by early October.
- Tighten your negative keyword lists before AI Max broadens reach further. This is the single highest-leverage thing you can do to control where budget goes.
- Review AI-generated assets and headlines manually rather than trusting the defaults. They’re editable — use that.
- Redefine what actually counts as a qualified conversion in your account. Industry research this year puts wasted ad spend as high as 30% in some estimates; a chunk of that comes from optimising toward the wrong conversion signal, not from the automation itself.
It’s Not Just Google — Microsoft Is Doing the Same Thing
Microsoft Advertising has rolled out its own AI Max for Search into general release, and turned it on by default for new Search campaigns. If you’re running ads across both platforms, the same discipline applies twice over: check what’s been turned on by default, and don’t assume the two platforms’ versions behave identically. It’s the same lesson we saw play out on the Meta Ads side with a London kitchen remodeling client (https://searchenginecore.com/how-meta-ads-generated-kitchen-remodeling-leads-london/) — platform automation works, but only once you know exactly what it’s been set to do.
Should You Fight the Default, or Let It Ride?
For most small businesses, there’s no real fight to pick here — the migration is happening whether you engage with it or not. The mistake isn’t letting it happen. The real mistake is checking this once and calling it done. Give it six weeks of actual attention — a 20-minute check-in on search terms, negatives, generated assets — and after that it just folds back into normal account hygiene.
FAQs
Do I need to do anything for the AI Max migration to happen?
No. It’s automatic and rolling out gradually through September 2026. But automatic doesn’t mean safe to ignore — recheck your account within the first two weeks after your campaigns migrate.
Will my existing Broad Match keywords stop working?
No, they’ll keep running. Google is migrating existing campaign-level Broad Match campaigns to AI Max rather than deleting them. What’s changed is that you can no longer build new campaign-level Broad Match campaigns from scratch.
What happens to Dynamic Search Ads (DSA)?
DSA isn’t auto-migrating yet. Google is currently sending in-account prompts nudging advertisers to upgrade voluntarily. The mandatory move to AI Max is scheduled for February 2027, after which creating new DSA ad groups won’t be possible at all.
Is AI Max the same thing as Performance Max?
Different thing entirely. Performance Max is its own goal-based campaign type, running across Search, Display, YouTube, Shopping and Maps all at once. AI Max stays inside standard Search campaigns — it’s about how keyword matching and ad assets get handled there, nothing to do with Performance Max’s cross-network reach.
Should small businesses be worried about this change?
Not really worried, no. But it’s worth fifteen minutes of attention rather than zero. Changes like this are easy to switch on by accident and never think about again — pull up exclusions, search terms and generated assets this week and you’re basically covered.
The pattern behind all of this is the same one running through most of Google Ads in 2026: the manual levers are disappearing one by one. When they’re gone, the only variables left that actually separate a good account from a mediocre one are your offer, your creative, your audience definition, and your landing experience. AI Max doesn’t remove the need for strategy. If anything, it makes the strategy work matter more, not less — the same conclusion we landed on from the organic side in Google AI Mode Explained: What It Means for SEO in 2026 (https://searchenginecore.com/google-ai-mode-explained-what-it-means-for-seo-in-2026/). The old goal was ranking. The new goal is being worth the algorithm’s trust, paid or organic.
Sanjeev Kumar is a digital marketing expert with over 14 years of experience in SEO, PPC, content marketing, and online growth strategies. He specializes in search engine optimization, AI-driven marketing, and digital strategy for businesses and agencies worldwide.
