Google Ads AI Max Migration: Your September 1 Audit

You have about 24 days. On September 1, 2026, Google Ads starts flipping a specific slice of Search campaigns into AI Max whether you touched anything or not. If any of your Search campaigns use Automatically Created Assets or the campaign-level broad match setting, this migration lands on you first. It is not optional. It is not a beta. And the accounts that ignore the calendar are the ones that will spend the second week of September asking why their search terms report suddenly reads like a stranger’s account.

This is the Google Ads AI Max migration. It applies to two features that a lot of accounts turned on years ago and never revisited. The email Google sent advertisers on August 5 is clear about the date, and PPC Land’s rundown of the exact changes lays out which features each campaign type inherits. This post is the operator version: what flips, who is exposed, and the audit you should run before the switch.

What the Google Ads AI Max Migration Actually Does

The Google Ads AI Max migration on September 1 covers two campaign types. First, any Search campaign running Automatically Created Assets, the setting that generates extra headlines and descriptions from your landing page. Second, any Search campaign using the campaign-level broad match setting. If a campaign has either one on, it moves. If it has both on, it still moves once. If it has neither, nothing changes.

The two paths inherit different AI Max features by default. Campaigns with Automatically Created Assets come out of the migration with search term matching and text customization both switched on. Campaigns with only the campaign-level broad match setting come out with search term matching alone. Text customization does not activate for that second group, and final URL expansion does not activate for either group by default. Both changes preserve your keyword lists, your bid strategy, and your budgets.

Google says the goal is to mirror your existing setup as closely as possible. That framing is technically true and practically incomplete. Search term matching is a real expansion of which queries your ad becomes eligible for, closer in spirit to broad match than to your original keyword list. Text customization is a real expansion of what your ad copy can say. Neither is a like-for-like swap.

Who the Google Ads AI Max Migration Hits First

The accounts most exposed to the Google Ads AI Max migration share three signals. First, they have at least one Search campaign with Automatically Created Assets or campaign-level broad match turned on right now. Second, they have not opened those campaign settings in the last six months. Third, they run pinned headlines or descriptions in responsive search ads for compliance reasons.

Regulated industries feel this hardest. If your account runs finance, healthcare, insurance, or legal copy that pins specific language into position one for compliance, and the campaign uses Automatically Created Assets, September 1 brings text customization into that campaign by default. Pinned positions still hold. What changes is that Google’s system can now write and rotate additional headlines and descriptions from your landing page content, and those will run alongside your pinned language. Nobody in compliance likes surprises.

Ecommerce accounts feel this differently. If your Shopping team runs Search campaigns with campaign-level broad match for reach, the September 1 switch adds search term matching on top. Your ads become eligible for queries your keyword list never targeted. That can be additive, or it can burn budget on adjacent intent that never converted before you were paying attention. Which one it is depends on your negative keyword hygiene going into the migration.

Lead-gen accounts feel this in the middle. If you rely on Automatically Created Assets for scale and your conversion signal is tight and journey-aware, the migration is probably a quiet upgrade. If your conversion signal is loose or your value-based bidding logic is guessing, the wider query set will find worse leads faster than the old setup ever did.

What the Google Ads AI Max Migration Does Not Change

Read the fine print before you plan around it. Dynamic Search Ads are not part of this September 1 wave. Google pushed the DSA auto-migration to February 2027, per the Search Engine Journal announcement in June. If your account is DSA-heavy and you assumed the delay covered everything, it did not. It covered DSA only. Automatically Created Assets and campaign-level broad match are still on the original September date.

Standard keyword campaigns without either of these two settings are not in scope. Performance Max, Demand Gen, and Shopping campaigns are not in scope for this specific migration. Bid strategies, budgets, negative keyword lists, and audience signals carry through untouched. This is a targeted upgrade of two features, not a whole-account overhaul.

The migration also does not remove your ability to change things afterward. You can turn off search term matching at the ad group level after the upgrade. You can turn off text customization. You can turn on final URL expansion if you decide you want it. Google is switching defaults, not removing controls. But defaults are what most accounts run on, and the defaults are changing.

The Google Ads AI Max Migration Audit for the Next Three Weeks

You have about three weeks. Here is the sequence.

Pull a list of every Search campaign in every account you manage. For each one, check two settings. Is Automatically Created Assets enabled? Is campaign-level broad match enabled? Flag any campaign where either answer is yes. Those are your migration campaigns. Everything else can stay off your radar for this specific change.

For each flagged campaign, decide before September 1 whether you want the default AI Max behavior or a different behavior. Three choices apply. Accept the default and let the upgrade run. Turn off Automatically Created Assets or the broad match setting before September 1 to avoid the migration entirely for that campaign. Or opt into AI Max manually now with your own feature selection so you control which features come on, when, and in what order.

Then clean your negative keyword lists. Pull the search terms report for the last 90 days. Every query that spent without converting and sits above your target CPA becomes a negative before September 1. This is the single most important pre-migration step for the broad match cohort, because search term matching will surface adjacent queries fast. If you already use nightly automation for search term mining, tighten the threshold for the next 30 days.

Baseline your reporting. Before September 1, export a clean report of conversion volume, CPA, ROAS, and impression share by campaign across the last 30 to 60 days. That reference lets you spot real drift instead of chasing noise in the first two weeks.

Brief your clients or leadership now, not after. A short proactive note beats explaining a surprise in the next monthly deck. If you send a monthly report, add a slide this cycle that names the in-scope campaigns, the pre-migration choice for each, and the metrics you are watching.

What to Do When September 1 Arrives

Do not panic-tune. Google says AI Max upgrades for eligible campaigns will complete by the end of September, so your account may not switch on September 1 exactly. Watch your account for the pop-up banner or a settings change in Automatically Created Assets or the broad match field. That is the signal the migration touched your campaign.

Monitor search terms daily for the first two weeks after the migration lands on any given campaign. Search term matching is where the biggest behavior change shows up first. If new queries appear that do not fit your intent set, add them as negatives immediately. Do not wait for a weekly review cycle. Set a nightly alert if you have to. Your nightly anomaly workflow is the right home for this check.

Watch text customization on the Automatically Created Assets cohort. The new headlines and descriptions the system writes will not read like your control copy. Some will outperform. Some will be off-brand. Review the asset performance report weekly for the first month, and mute anything with low relevance scores or off-brand phrasing at the asset level.

Resist the urge to add more feature flags. If you decide later that final URL expansion is worth turning on, add it after your baseline stabilizes. One change at a time makes cause and effect readable.

Update your PPC review cadence for the rest of the quarter. Every campaign audit through October should include an AI Max features check, a search terms diff against your baseline, and an asset performance review. If your team uses standardized diagnostic prompts, add one that names AI Max drift as a specific pattern to catch.

The Bigger Point About Migrations You Did Not Choose

Google keeps shipping automatic feature upgrades that reward one discipline. Know what is on in your account, know when you turned it on, and know what happens when Google redefines what the setting means. The Automatically Created Assets checkbox you clicked two years ago has now become a doorway into text customization. The campaign-level broad match toggle you enabled for reach has now become a doorway into search term matching.

Migrations like this are the operational cost of running on managed platforms. The Google Ads terms change earlier this year was another version. So was the data retention drop to 37 months and the Asset Studio and Performance Max shift. Each one repackages a feature you already use into something with different defaults, wider inputs, or new AI behavior.

Set a quarterly reminder to audit which automated features are on in every account. Not because any single migration is catastrophic. Because you want to be the person who briefed the client weeks before, not the person explaining a surprise on the Monday after. When Google ships the next migration, you read the release note, run the audit, brief the account, and move on.

If you want a second set of eyes on your ACA and broad match exposure before September 1, book a free consultation with our PPC team and we will walk through the audit with you. Let’s Grow!