Google AI Max Is Here: Keeping Your Brand in Control When AI Writes Your Ads

In September 2026, many advertisers logged into Google Ads and found an unfamiliar label on their Search campaigns: AI Max. You didn't click the wrong button. Google is automatically upgrading legacy campaign-level broad match and Automatically Created Assets campaigns to Google AI Max. From this month on, more of the work of choosing queries, rewriting headlines, and even deciding which page to send people to is done by AI. For brand owners, the real question isn't whether to use AI. It's this: when AI starts speaking for you, can your brand still hold its shape?

Google AI Max auto-upgrade: what happened in September

Based on Google's announcements and industry coverage, the timeline looks like this:

• From August 3, 2026: New campaign-level broad match and legacy Automatically Created Assets (ACA) campaigns can no longer be created in the Google Ads UI, Ads Editor, or the API.
• September 1–30, 2026: Existing campaigns of both types are upgraded to AI Max in waves. ACA campaigns come over with search term matching and text customization switched on by default; campaign-level broad match campaigns come over with search term matching on. Google says the upgrade is configured to closely mirror your legacy setup, and existing brand inclusions and exclusions carry over.
• Dynamic Search Ads (DSA): Originally scheduled for the same window, but Google updated its announcement in June: the DSA sunset and auto-upgrade now begin in February 2027.

Google positions AI Max as "the next generation of Dynamic Search Ads" and says Search campaigns using the full AI Max feature suite see, on average, about 7% more conversions or conversion value at a similar CPA/ROAS compared with search term matching alone. That's Google's own figure; your results will depend on your industry and account structure.

When AI writes your ads, where the brand risk hides

AI Max's three core capabilities are search term matching (broad match plus keywordless technology to extend reach), text customization (headlines and descriptions generated from search intent), and final URL expansion (automatically choosing the page on your site it judges most relevant). All three shift decisions from people to the model.

For accounts chasing conversion volume, that's good news. For companies that care about brand consistency, it introduces specific risks:

• Tone drift: AI rewrites headlines to match queries. A premium, understated brand can suddenly show up with "limited-time deal" or "cheapest" — words it would never use.
• Unapproved promises: Generated copy can surface prices, discounts, or implied outcomes that cross regulatory lines in industries like aesthetics, finance, or health.
• Wrong landing pages: URL expansion may send high-intent users to an old blog post, a careers page, or an expired promotion.
• Diluted traffic: With wider matching, branded demand can get mixed with competitor or irrelevant queries that eat the budget.

It's the same issue we covered in "Can AI Read Your Brand Guidelines?": when AI output feels off-brand, it's usually not because the model is weak, but because it never received clear enough rules.

Three Google AI Max controls that protect your brand

The good news: AI Max isn't an all-or-nothing black box. The controls listed in Google's documentation are enough for brands to keep a hand on the wheel.

1. Brand inclusions and exclusions

Brand inclusions work at the campaign and ad group level; brand exclusions at the campaign level. At minimum, manage your own brand terms separately from non-brand campaigns, and exclude competitors or unrelated brands you don't want to be associated with.

2. URL inclusions and exclusions

URL inclusions sit at the ad group level; URL exclusions at the campaign level. Exclude careers pages, privacy policies, old promotions, and blog posts that make poor landing pages, and use URL inclusions to point to the service pages that matter most. If your site structure isn't clean yet, you can turn final URL expansion off for now.

3. Text guidelines

This is where brand teams should invest the most time. In 2026 Google opened the text guidelines beta to advertisers globally, with two tools:

• Term exclusions: up to 25, each up to 30 characters — words or phrases that must never appear in generated copy.
• Messaging restrictions: up to 40, each up to 300 characters — plain-language instructions on concepts, associations, or tones to avoid, or the tone your brand should use.

Note that Google's help page says term exclusions can't block copy that includes prices (excluding "$" won't stop "shoes under $50"); you need a messaging restriction such as "Don't generate assets with prices." Which proves the point: turning brand guidelines into specific, executable rules is the real line of defense.

A 30-day brand checklist after the upgrade

If your campaigns were auto-upgraded in September, work through this list over the next month:

1. Review the search terms report: Queries driven by AI Max are labeled with an "AI Max" match type. Look for irrelevant or brand-damaging terms and add negatives where needed.
2. Review the landing pages report: Check whether the pages AI chose actually fit, and add URL exclusions for those that don't.
3. Review generated headlines and descriptions: When copy doesn't sound like you, translate the reason into a messaging restriction instead of just deleting the asset.
4. Split brand vs. non-brand performance: Make sure "growth" isn't just branded traffic you would have gotten anyway, counted again.
5. Check your website itself: AI draws on your site content to write ads. The clearer and more consistent your service descriptions, pricing, and tone, the more your ads will sound like you.

Closing: AI scales, people set the tone

The AI Max auto-upgrade is a snapshot of search advertising moving toward AI agents: budgets, queries, copy, and landing pages are increasingly decided by the model in real time. That's not a bad thing — AI is good at finding what works across huge numbers of combinations. But what your brand won't say, and the image it won't project, is not something AI can decide for you.

AI delivers perfection; people deliver emotion. When TitApeX helps brands plan their websites and digital marketing, we also turn brand voice, word no-go lists, and site architecture into rules AI can follow, so your ads still sound like you as they scale. If your account was just upgraded and you're not sure how to set it up, let's talk.

References

• Google's Dynamic Search Ads are upgrading to AI Max (Google Blog, updated June 2026)
• Google Ads To Migrate Automatically Created Assets & Campaign-Level Broad Match To AI Max September 1 (Search Engine Roundtable)
• Google sets AI Max migration timeline for Search campaigns (Search Engine Land)
• How AI Max for Search campaigns works (Google Ads Help)
• Use text guidelines with Performance Max and search campaigns (Google Ads Help)
• We're expanding beta access to text guidelines for all advertisers globally in AI Max (Google Blog)