AI Max for Search 2026: Should You Turn It On?

Table of contents

• Verdict
• What actually changed
• Who should turn it on now
• Who should wait
• How to set up AI Max for Search safely
• FAQ

Verdict

AI Max for Search left beta in April 2026 and is now open to every advertiser. Google’s own internal data puts the uplift at +7% conversions or conversion value at a similar CPA or ROAS. That number comes from Google, not an independent study, so take it with some salt. But the feature is real, the DSA sunset is coming in September 2026, and for the right accounts it makes sense to move now. For the wrong accounts, turning it on blind will cost you. Here is how to tell which side you are on.

By Zara Imrie, Google Ads and AI Marketing Specialist, founder of Bizi Digital

What actually changed

AI Max for Search officially moved out of beta in April 2026. Google announced general availability alongside several updates at Google Marketing Live 2026, and the changes are more than cosmetic.

The headline feature is AI Brief. Instead of building out keyword lists and ad copy one piece at a time, you write plain-English guidelines covering messaging, matching behaviour, and audience targeting. Google uses those guidelines to shape how the campaign finds and converts demand. Think of it as a brief to a media buyer, except the media buyer runs a trillion queries a day.

Text disclaimers are new and actually matter for certain industries. Previously, if you needed legally required text to appear consistently, you had to pin it. With final URL expansion, pinning was awkward. Now text disclaimers attach compliance copy to your ads regardless of how the URL or headline gets assembled. If you are in financial services, healthcare, or anything regulated, this is not a nice-to-have.

Beyond that, Google has improved performance quality across creative and targeting. The query matching is broader than standard exact and phrase match. That is the capability, and also the risk.

Retailers get AI Max for Shopping. Travel advertisers get travel-specific formats. This post focuses on standard Search campaigns, but worth knowing the product is expanding.

Source: Google Marketing Live 2026 keynote and product announcements.

Who should turn it on now

There are account types where AI Max is a straightforward yes right now.

Accounts running DSA campaigns. Dynamic Search Ads sunset in September 2026. AI Max with final URL expansion is the replacement Google intends. If you are still on DSA, the migration path is AI Max, and the earlier you test it the more time you have to catch problems before the forced cutover.

Accounts with strong conversion data and clear CPA or ROAS targets. AI Max is a Smart Bidding-adjacent product. The more historical signal you give it, the better the matching quality. If your campaigns are already hitting target, turning on AI Max with URL expansion and a well-written AI Brief can find incremental volume you are missing with tighter keyword strategies.

Lead gen accounts with a reasonably broad offer. If your product or service genuinely serves a wide range of search intents, AI Max’s broader matching finds people who want what you sell but do not phrase it the way you expected. I have seen this work well for B2B services, local trades, and education. The risk is still there (more on that below), but the ceiling is higher.

Regulated industries with compliance requirements. The new text disclaimer feature means you can finally run broader creative without the anxiety of your required legal copy disappearing. That alone might be the deciding factor for financial services accounts.

Who should wait

Not every account should move now. There are real risks and some of them are expensive.

Query expansion is the main risk. AI Max casts a wider net on search terms. For niche products with very precise buyer intent, that net catches a lot of irrelevant traffic. You will see impressions go up. You need to be watching whether conversions and CPA move in the same direction, because they will not always.

Brand term leakage. With URL expansion and broader matching, Google can start serving your ads on branded queries for competitors, or conversely, let competitor-adjacent terms bleed into your results. Your search terms report becomes more important, not less. If you are not set up to monitor it closely, wait until you are.

Accounts with brand safety restrictions or strict URL rules. Final URL expansion means Google may direct users to pages other than the one you specified. For most advertisers this is fine or even good. For accounts with strict compliance, regulated landing pages, or legal restrictions on where paid traffic can land, it is a problem. Check your brand safety requirements before enabling.

Low-volume accounts. If you are spending under roughly £2,000 a month and running limited conversions, AI Max does not have enough signal to work well. You will get broader matching without the intelligence to back it up.

I made the mistake of testing a broad expansion feature years ago on a tight-margin e-commerce account before the conversion data was there. Spend went up 40% in the first week. Sales did not. It took two weeks to recover the budget and two months to trust the data again. More data first, more automation second. That order matters.

How to Set Up AI Max for Search Safely

Do not just toggle AI Max and walk away. These steps reduce the risk.

1. Write a proper AI Brief before you launch. This is not optional. The AI Brief is how you tell Google what your messaging boundaries are, who your audience is, and what match behaviour you expect. Leave it blank and you are handing Google a blank cheque. Be specific about what you do and do not want. Include product positioning, audience qualifiers, and any terms or contexts to avoid.

2. Set up brand exclusions. Protect your brand terms. Exclude competitor brand terms you do not want to appear on. AI Max expands reach, so tighten the edges deliberately.

3. Turn on text disclaimers if you are in a regulated industry. Do this before launch, not after you get a compliance flag.

4. Pull your search terms report weekly for the first month. Not monthly. Weekly. You want to catch drift early before it compounds.

5. Set a clear CPA or ROAS target in your bidding strategy. AI Max performs best with a clear target to optimise against. If you are running manual or enhanced CPC, switch to a target-based strategy first.

6. Start with one campaign, not your entire account. Test the behaviour on a mid-sized campaign with solid historical data before rolling out across the account.

FAQ

Is AI Max for Search the same as Performance Max?

No. AI Max is a Search-specific product. It expands query matching, enables final URL expansion, and adds the AI Brief feature, but it runs within Search campaigns. Performance Max runs across all Google inventory including Display, YouTube, Shopping, and Gmail. They are separate products with different use cases.

What is the +7% conversion claim based on?

Google’s internal data from non-retail advertisers with search term matching enabled. This is not an independent study. It represents an average across campaigns in their testing pool, not a guarantee for your account. Treat it as directional evidence that the product works in the right conditions, not as a target you will automatically hit.

Can I use AI Max if I have brand safety requirements?

You can, but you need to configure it carefully. Use brand exclusions, negative keywords, and text disclaimers as appropriate. Final URL expansion can be restricted or turned off if your compliance requirements do not allow Google to select landing pages. Check with your legal or compliance team before enabling URL expansion on regulated accounts.

Do I need to migrate my DSA campaigns to AI Max?

DSA campaigns are being sunset in September 2026. AI Max with final URL expansion covers the same use case and more. Google’s recommendation is to migrate. If you are running DSA now, start testing AI Max on a parallel campaign so you have time to find and fix issues before the forced cutover.

What happens to my existing keyword strategy when I enable AI Max?

Your existing keywords still function. AI Max expands the reach beyond those keywords using search term matching, but it does not delete or override your keyword list. The expansion works alongside your existing structure. That said, your search terms report will look different, and you should expect to add negative keywords as you learn what the broader matching catches.

Ready to test AI Max in your account?

If you want a second pair of eyes before you enable AI Max, or you are not sure whether your account is set up to handle broader matching safely, I can take a look. Bizi Digital works with owner-led businesses on Google Ads strategy and AI-driven campaign builds.

Get in touch

This post was drafted with AI assistance and reviewed by Zara Imrie.

Last updated: May 2026 – Initial publication

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