Why AI Max Migration Will Reshape Paid Search

Key takeaways

• AI Max migration turns older Search campaign controls into an enforced account hygiene deadline, not an optional feature test.
• Campaign level broad match and legacy Automatically Created Assets move first, with DSA migration following in February 2027.
• The biggest risk is poor conversion data training AI Max towards cheap enquiries rather than profitable customers.
• UK advertisers should export affected campaigns, clean conversion actions, split brand from non brand, and rebuild DSA logic as landing page rules.
• Scripts, dashboards and API integrations need checking now so deprecated campaign structures do not break reporting or automation.

AI Max migration is not a cosmetic Google Ads update. It is Google moving older Search campaign controls into a more automated system, with less tolerance for loose structure, weak tracking and lazy query management. UK advertisers still relying on campaign level broad match, standalone Automatically Created Assets or Dynamic Search Ads need to act before Google acts for them.

The danger is not that campaigns will stop serving. The danger is that they will keep serving with different control points, and your reports will make the shift look like normal performance drift. We covered the wider direction in our earlier briefing on AI Max Search auto upgrades. This new timeline gives advertisers a deadline, not a suggestion.

What has actually changed in the AI Max migration

Google is retiring several legacy Search campaign structures and moving them into AI Max. From September 2026, Search campaigns using campaign level broad match or standalone Automatically Created Assets are set to move automatically to AI Max settings. Google says the migration will happen in place, with equivalent settings applied and existing brand inclusions and exclusions carried across.

Advertisers are already blocked from creating new campaign level broad match configurations and legacy ACA campaigns through the Google Ads interface, Ads Editor and the API. That matters because it turns AI Max from an optional upgrade path into the default Search direction.

Dynamic Search Ads get a longer runway. Google plans in account notices from September 2026, reminders in January 2027, then automatic DSA migration during February 2027. New DSA ad group creation is due to end when that automatic migration begins.

Why this matters for UK advertisers

The commercial risk sits in the gap between equivalent settings and equivalent outcomes. Google can migrate settings, but it cannot recreate the intent discipline that sat inside a well managed account. If a DSA campaign covered a tightly curated section of your site, that logic needs translating into AI Max controls, landing page choices, brand rules and negative keyword safeguards.

Here is the mechanism. Campaign level broad match already gives Google a wider route into auctions than tightly segmented exact and phrase structures. When that targeting logic moves into AI Max, Google has more scope to match user intent through signals, assets and landing page understanding. That creates upside for accounts with clean conversion data and clear commercial intent. It creates cost leakage for accounts where every lead is treated as equal, every form fill is imported as a win, and brand traffic is mixed with prospecting.

Our concern is simple. Smart Bidding will optimise towards the conversion signal you give it. If that signal includes weak leads, duplicate form fills, low value enquiries or unqualified calls, AI Max will not fix the problem. It will scale the problem into more auctions.

That is why tracking and keyword waste matter before you migrate. Across the lead generation accounts we audit, a big chunk of Search spend routinely lands on terms that either convert nothing or cost several times the account’s own average on a last touch basis. Some of that is legitimate: brand defence, testing, assisted value that last click never credits. Plenty of it is not. The point is that your reported waste is only as honest as your conversion data, and in most accounts that data flatters the picture. Clean up the measurement first and the true number usually looks worse before it looks better. For a structured way to read this, our guide to conversion funnel analysis for PPC is a sensible starting point.

The migration will expose that weakness. If your current Search structure is already carrying unproductive query spend, broader AI led matching gives Google more room to find similar traffic. More automation does not remove the need for control. It moves the control layer from keywords alone into data quality, conversion value, exclusions, assets and landing page mapping.

The DSA problem is bigger than the name suggests

Dynamic Search Ads often sit in accounts as a forgotten coverage layer. They pick up long tail queries, broken keyword gaps and product or service pages that nobody has mapped properly. Some do useful work. Plenty cannibalise better structured Search campaigns, especially where site content is broad and conversion tracking is blunt.

When DSAs move into AI Max, advertisers who never cleaned them up will inherit a messy intent map. The account will still spend. The issue is where. If your website contains advice content, careers pages, supplier pages, legacy product pages or thin local pages, those pages need excluding or correcting before the migration. Otherwise AI led matching will use poor landing page signals as a route into poor auctions.

PPC Geeks’ View

The accounts we worry about most during this migration are lead generation accounts running broad match with Smart Bidding, thin offline qualification data and a DSA campaign bolted on for coverage. Those accounts already look busy in Google Ads. Clicks arrive, conversions register, and the platform says the campaign is learning. Sales teams tell a different story.

The specific problem advertisers will face is conversion inflation. If every form submission counts as equal value, AI Max will favour the easiest conversions, not the best customers. That means more budget moves towards cheap enquiries, repeated users, weak informational searches and lower intent landing pages. CPA can look stable whilst sales quality drops.

AI Max is not the problem. Unqualified conversion data is the problem. The migration simply removes some of the old hiding places where poor structure used to survive.

— Rory Bettany, Senior PPC Account Manager, PPC Geeks

In real campaign work, we see this most often in home services, B2B lead generation and healthcare accounts where call quality and enquiry quality sit outside Google Ads unless offline data is imported. The immediate takeaway is clear: classify conversions before the migration. Primary conversions should reflect commercial value. Soft signals should be secondary. Junk leads should not train bidding at all.

This is exactly the type of issue we look for in a free Google Ads audit, especially where automation, tracking or campaign structure is already affecting performance.

Your pre migration checklist

1. Export every affected campaign this week. Pull a list of Search campaigns using campaign level broad match, standalone ACA and DSA ad groups. Add columns for conversion action, bidding strategy, brand exclusions, final URL expansion behaviour, landing pages, negatives and search term cost. You need a fixed pre migration record, not a vague memory of how the account used to work.
2. Separate brand protection from prospecting. If brand and non brand activity share budgets or bid strategies, split them before the migration. Brand inclusions and exclusions carrying over is useful, but it does not solve mixed intent. Keep brand defence in its own structure so AI Max does not use cheap branded conversions to justify wider prospecting spend.
3. Rebuild DSA logic as landing page rules. Take each DSA campaign and list the pages it should never use. Exclude careers, blog, support, legal, supplier, out of stock, old service and low margin pages. Then group the remaining pages by commercial intent. AI Max needs clean landing page signals, not a website crawl with all the doors open.
4. Switch weak conversion actions to secondary. Go to Goals, Conversions, Summary in Google Ads. Any action that represents a newsletter sign up, short form, page view, button click, duplicate call or unqualified enquiry should stop feeding bidding. Keep it visible in reporting, but remove it from primary optimisation. For lead gen, import qualified lead stages from your CRM within three days of the sales event.
5. Rewrite asset governance. Automatically Created Assets are moving into a broader AI Max environment. Lock down claims, pricing language, regulated wording and location statements before Google starts combining signals at scale. UK advertisers in finance, healthcare, legal and home improvement need sign off rules, not post launch apologies. If your sector carries wording risk, align ad copy checks with your UK advertising compliance process.
6. Audit scripts and reporting tools. Developers and in house teams need to replace references to legacy campaign level broad match and ACA entities with AI Max settings. Scripts that label campaigns, split budget, alert on DSA spend or report by campaign subtype will break or misclassify activity if they depend on deprecated structures.

For the official timetable, use the Search Engine Land migration timeline report as the clearest public summary, then validate account controls against Google’s AI Max for Search guidance. If your stack uses the API, map script changes against the Google Ads API sunset dates before your next release cycle.

What this means for your campaigns

The migration is, in the end, a deadline for account hygiene. It rewards advertisers with clean tracking, disciplined brand separation, useful assets and clear landing page logic. It punishes accounts that use automation as a cover for weak measurement.

Do not wait for the automatic upgrade and then explain away the variance. Build a pre migration benchmark now: search term quality, conversion mix, CPA by intent, lead qualification rate, landing page cost and brand versus non brand performance. Then make the account fit for AI led controls before the switch happens. If you want a broader view of the automation shift, our take on Google AI tools for UK PPC teams sets the context.

If your internal team is stretched, get support from specialists who work inside live Google Ads accounts every day. That is the core of what our Google Ads management agency does. A migration audit should tell you which campaigns are exposed, which conversion signals are unsafe, and which controls need rebuilding before spend drifts.

If you’d like a second pair of eyes on how this affects your account, our team offers a free Google Ads audit, with no strings.

Frequently asked questions

What is AI Max migration in Google Ads?

AI Max migration is Google’s move to shift legacy Search campaign features, including campaign level broad match, standalone Automatically Created Assets and Dynamic Search Ads, into AI Max settings. It changes where advertisers manage controls across matching, assets, landing pages and brand rules.

Which campaigns should UK advertisers audit first?

Start with Search campaigns using campaign level broad match, standalone ACA and Dynamic Search Ads. Prioritise lead generation accounts using Smart Bidding, broad match and weak offline lead qualification because those accounts are most exposed to conversion quality problems.

Will existing brand exclusions carry over?

Google says existing brand inclusions and exclusions will carry over automatically during the migration. Advertisers should still test brand separation because carrying a setting over does not fix mixed budgets, mixed intent or branded conversions training wider prospecting activity.

How should advertisers prepare Dynamic Search Ads?

List every DSA target, export the landing pages, exclude non commercial pages and rebuild the logic around page groups with clear intent. Careers, blog, supplier, support and legacy pages should not be left available for AI led matching.

What should developers do before API support changes?

Developers should audit scripts, dashboards, automated labels, reporting pipelines and budget rules for references to legacy campaign level broad match, ACA and DSA entities. Replace those dependencies with AI Max settings before older API versions reach sunset.