Google Ads AI Max is an optimization layer inside existing Search campaigns, built from search term matching, text customization, and final URL expansion. Starting in September 2026, Google automatically upgrades Search campaigns that use automatically created assets or the campaign-level broad match setting, so those settings change whether or not you asked for them.
Google's own wording is that campaigns using automatically created assets and the campaign-level broad match setting will continue to be auto-upgraded starting in September 2026, with all upgrades for eligible campaigns expected to conclude by the end of that month (Google Ads & Commerce blog). That gives most advertisers a few weeks to prepare.
The Google Ads AI Max auto-upgrade begins in September 2026
Two separate migration tracks are now running, and conflating them is the most common mistake in the coverage. Google's blog post confirms campaigns using automatically created assets and the campaign-level broad match setting are auto-upgraded starting in September 2026, while the Dynamic Search Ads sunset and auto-upgrade was extended to begin in February 2027 (Google Ads & Commerce blog). Same destination, very different deadlines.
The specific date circulating as 1 September comes from advertiser notification emails rather than Google's documentation. Search Engine Land reported advertisers receiving emails stating that beginning 1 September, Search campaigns using automatically created assets or the campaign-level broad match setting would be automatically upgraded (Search Engine Land). Google's pages say only starting in September. Plan against the earlier date and audit accounts now, the same way we approach any marketing technology change.
Three features make up AI Max for Search campaigns
AI Max is a bundle of three settings, and knowing which one does what determines what you turn off later. Google defines search term matching as using broad match, asset-based, and landing page-based technology to optimize campaign reach; text customization, formerly known as automatically created assets, as generating ad copy from your existing ads, landing page copy, and assets; and final URL expansion as sending traffic to the most relevant URLs on your website (Google Ads Help).
The dependency between them is easy to miss: final URL expansion requires text customization to be turned on (Google Ads Help). Google also describes AI Max as an optimization layer inside existing Search campaigns instead of a new campaign type, so nothing gets rebuilt. What changes is where your traffic lands, which puts pressure on B2B website conversion across every page AI Max can select.
The AI Max performance figures depend on which baseline you read
Two different uplift numbers are circulating for AI Max, and they measure different things. Google's blog states that AI Max for Search campaigns see an average of 7 percent more conversions or conversion value at a similar CPA or ROAS when using the full feature suite, compared with using search term matching alone (Google Ads & Commerce blog). That is an incremental gain on top of already having AI Max switched on.
The other figure has a different baseline entirely. Google Ads Help states that advertisers who activate AI Max in Search campaigns will typically see 14 percent more conversions or conversion value at a similar CPA or ROAS, which compares AI Max on against AI Max off (Google Ads Help). Both are footnoted as Google internal data for non-Retail advertisers, the 14 percent from 2025 and the 7 percent from 2026. Hold vendor-reported lift to the same standard as any forecast input, as we argue in the pipeline coverage ratio.
Dynamic Search Ads convert to responsive search ads in February 2027
The DSA migration restructures your account at the ad group and ad level. Google Ads Help documents that dynamic ad groups will convert to standard ad groups, existing Dynamic Search Ads will become Responsive Search Ads, and legacy URL rule types will become read-only, meaning you can remove them but not edit or re-add them (Google Ads Help).
The developer blog gives the cleanest timeline: the automigration was postponed from September 2026 to February 2027, the ability to create new DSAs was restored on 15 June 2026, DSA creation is removed in January 2027, and automigration begins the following month (Google Ads Developer Blog). If DSA carries meaningful volume for you, use the runway to build page feeds and URL controls deliberately. Local advertisers should read this alongside Google Local Services Ads.
Brand and URL controls survive the upgrade, and RSA pinning stops working
You keep more control than the coverage suggests, provided you know which level each control lives at. Google Ads Help documents brand inclusions at both campaign and ad group level, brand exclusions at campaign level only, locations of interest at ad group level, URL exclusions at campaign level, and URL inclusions at ad group level (Google Ads Help). Negative keywords are respected with AI Max turned on (Google Ads Help).
One loss deserves a flag before September. Google states that if you enable both text customization and final URL expansion, pinning of responsive search ad assets will not be respected, and pinning is also ignored when URL inclusions are provided (Google Ads Help). Any account relying on pinned legal or brand copy needs a plan, since the compliance exposure sits with the advertiser. Consistent messaging matters as much here as in CRM data quality.
AI Max reporting has real gaps Google documents itself
The reporting is better than early AI Max critics claimed, and Google names its own blind spots. The search terms report gains an AI Max match type and a Source column distinguishing broad match expansion from keywordless matches, plus a combined view of search terms and landing pages from AI Max; the keywords report adds aggregate rows; AI-written assets are tagged Google AI in the Added by column; and landing pages gain a Selected by column (Google Ads Help).
The caveat is in the same document. Google warns that filtering for match type equals AI Max may show lower numbers because the filter does not consider Other search terms, so the obvious way to size AI Max traffic undercounts it (Google Ads Help). Google also advises waiting at least two weeks after enabling AI Max before making changes such as adding negative keywords. Reconcile against your own analytics, the way we handle AI traffic in GA4.
Turning AI Max off after the upgrade costs you other settings
There is no documented pre-emptive opt-out, so the realistic plan is to prepare for the upgrade and decide afterwards. Google Ads Help documents a toggle to opt out of all AI Max settings after the fact, and warns that if your campaign is running brand exclusions and AI Max is turned off, brand exclusions will be disabled (Google Ads Help). Switching off costs you a control you probably wanted to keep.
Three preconditions decide whether AI Max helps you at all. Search term matching will not work with manual CPC bidding (Google Ads Help), Google states AI Max will not be effective if campaigns are limited by budget, and misconfigured tracking templates can produce 404 errors on expanded landing pages (Google Ads Help). Fix bidding, budget, and tracking templates before September. For accounts without a senior paid-media owner, this is the kind of decision a fractional CMO should be making, and we can audit your account with you.
