Google is moving your Search campaigns to AI Max. You don't get a vote.
If you run Google Search campaigns, something changed on your account this month.
From 1 September 2026, Google began automatically upgrading Search campaigns that use campaign-level broad match or standalone automatically created assets over to AI Max. The rollout is gradual across the month, and Dynamic Search Ads are lined up to follow into early 2027. For a lot of accounts, this is happening in the background whether or not anyone clicked "apply".
So it is worth understanding what AI Max actually is, what it changes, and what you should check before the switch flips on a campaign you care about.
What is AI Max, in plain terms?
AI Max is not a new campaign type. It is a bundle of AI features that sits on top of your existing Search campaigns. Google announced it at Marketing Live in 2025 and spent the year rolling it out globally, and in 2026 it is widely available.
There are three features doing most of the work:
Search term matching. Your keywords stop behaving like strict rules and start behaving like signals. AI Max looks for relevant queries beyond your exact keyword list, closer to how broad match and Dynamic Search Ads already work.
Text customisation. The system can generate and reshape headlines and descriptions on the fly, pulling from your landing pages, existing ads and assets to match the query it is answering.
Final URL expansion. Google can send traffic to the most relevant page on your site rather than the final URL you set, when it thinks that will perform better.
Put together, the pitch is simple. Less manual keyword and copy management, more of Google's automation deciding what shows and where.
What is actually being migrated, and when?
The automatic upgrade targets two things first: campaigns running campaign-level broad match, and campaigns using standalone automatically created assets. Those are being moved to AI Max through September, campaign by campaign, rather than all at once.
Dynamic Search Ads are the next domino. They are expected to move across into early 2027, and given how much they overlap with AI Max's keywordless matching, a formal deprecation of DSAs would not be a surprise.
The takeaway: if your account leans on broad match, auto-created assets or DSAs, assume this affects you.
What changes inside your account?
The obvious shift is control. With search term matching on, you have less say over exactly which queries trigger your ads. With text customisation on, you have less say over the exact wording that appears. With final URL expansion on, you have less say over which page the click lands on.
The less obvious shift is visibility. AI Max campaigns are in the eligible pool for placements inside AI Overviews and AI Mode, the conversational surfaces where more and more searches now start. Keyword-only campaigns cannot reach those placements. So this is not purely about squeezing more from traditional search results. It is also about staying visible as search behaviour moves.
Worth knowing: features like search term matching, text customisation and final URL expansion lean on conversion-based Smart Bidding to work properly. If your conversion tracking is messy, the automation is optimising towards a blurry target.
Does it actually work?
For a lot of accounts, yes. Google's own figures suggest advertisers who activate AI Max on Search typically see around 14% more conversions or conversion value at a similar cost per acquisition or return on ad spend. When your tracking is clean and your controls are set sensibly, that uplift is real and well worth having.
The one thing to get right is how you measure it. Some of the gains you see at campaign level can come from traffic that would have converted through your other campaigns anyway, so the account-level picture is the one that tells the truth. Keep an eye on incrementality and conversion quality rather than just the headline campaign graph, and you will get an honest read on what AI Max is adding.
Set up well and measured properly, it is a genuine step forward. It simply rewards the advertisers who watch the right numbers.
What should you check before the switch flips?
If a campaign is being migrated, a bit of setup discipline now will save you a nasty surprise later. Here is the short list.
Write down your baseline first. Record your current keywords, search terms, landing pages, conversion actions and performance benchmarks. If you cannot describe what a campaign is doing before the change, you will not be able to explain what changed after it.
Set your brand controls. Use brand exclusions to keep your ads off competitor and irrelevant brand searches, and brand inclusions where you only want to appear against your own terms. These now sit alongside the AI Max settings.
Add term exclusions and messaging guidelines. If text customisation is on, tell it what it cannot say. Block restricted words or phrases and set the tone so generated copy stays on-brand.
Review final URL expansion. It is on by default when you opt in. Exclude pages that should never receive paid traffic, such as policy pages, support pages, gated content and thin top-of-funnel articles.
Clean up conversion tracking. These features depend on conversion-based Smart Bidding, so sort your tracking before you trust the automation to optimise around it.
Watch quality, not just volume. Keep an eye on cost per lead and conversion quality, not only cheaper clicks and bigger click counts.
Set a monitoring cadence. Check search terms and generated copy weekly for the first month on any newly migrated campaign, then ease off once you trust it.
Where this leaves you
The direction of travel is clear. Google Ads is handing more of the day-to-day decisions to automation, and the migration to AI Max is part of that. Fighting it outright is not really an option when the upgrade happens on its own.
What you can still own is the strategy around it. Clean data, tight brand controls, sensible URL rules and honest measurement are what separate an account that benefits from AI Max from one that just spends more and calls it growth.
If you would rather not find out mid-month which of your campaigns quietly changed, now is the time to audit them.
Need a hand with pay-per-click campaigns?
We manage Google Ads accounts through exactly these kinds of platform shifts, and we are already working through client accounts to check what has migrated and what needs tightening. Get in touch with our team to discuss PPC today - we'd love to hear from you!
