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Fix: AI Max for Search eligible but not enabled

finding google ads updated 2026.05.27 8 min read
// contents · 7 sections
  1. Why this matters
  2. How to verify the issue
  3. How to fix it
  4. How to confirm the fix worked
  5. Diagnostic checklist — re-measure 14-48 hours after enable, full read at 14-28 days
  6. Related rules + concepts
  7. Sources

Your Search campaign is sitting on an unused AI Max toggle. Google launched AI Max for Search in open beta on May 6, 2025 [6] and reports that advertisers who activate it typically see 14% more conversions or conversion value at a similar CPA/ROAS [1][5]. If your account is in a supported region, uses Smart Bidding, and you have not opted in, you are leaving Google's own benchmark lift on the table.

Why this matters

MEDIUM severity. AI Max for Search is not a new campaign type — it is an optional suite of AI-powered enhancements applied to a regular Search campaign that improves three things: search term matching (broad-match plus keywordless query expansion), creative asset optimization (text customization), and final URL expansion (landing-page selection) [3]. Each layer plugs an underused source of incremental conversions that traditional exact-and-phrase keyword setups cannot reach.

Google's own published lift figure for activation is 14% more conversions or conversion value at a similar CPA/ROAS for non-retail advertisers, and up to 27% lift for campaigns still heavily reliant on exact and phrase match [1][5]. The mechanism is straightforward — AI Max widens the eligible auction pool with keywordless matching, then leans on your Smart Bidding signal to filter for value at bid time. The benefit only materializes when bid-time intelligence is doing the filtering: AI Max's documentation explicitly states that "if you use Manual Cost-Per-Click (CPC) with AI Max, the full benefits and capabilities of AI Max will be limited" [2]. In practice this means Manual CPC accounts will see the broader matching surface but no countervailing value-based bid pressure, and the lift collapses.

A second, less obvious cost: the longer an eligible campaign goes without AI Max enabled, the more its search-term coverage gap compounds. Competitors that opted in early are already absorbing keywordless queries you cannot see in your search-terms report. There is no "catch up" advantage for late adopters — only steady leakage of incremental conversion volume to whoever is matched on the keywordless surface today.

Independent practitioner data tells a more mixed story than Google's headline figure, with some advertisers reporting CPA increases alongside revenue lift. The implication for your audit: AI Max is a high-expected-value enablement, but not a "set it and forget it" toggle — activate with brand controls and locations-of-interest scoped, run an experiment first if your campaign is at scale, and measure incremental conversions against pre-AI-Max baselines before declaring the rollout a win.

How to verify the issue

  1. Open Campaigns → select the Search campaign in question → Settings. Scroll the section menu and look for an AI Max entry. If the toggle inside that section is off, the campaign is eligible-but-not-enabled.
  2. Confirm bid strategy is Smart Bidding (Maximize Conversions, Maximize Conversion Value, Target CPA, or Target ROAS). Navigate to Settings → Bidding. Manual CPC accounts will technically be allowed to opt in but will not see the documented uplift [2].
  3. Confirm the account is in a supported region. Per Google's expansion blog, "all advertisers globally can now use AI Max for Search campaigns" [4], so eligibility is no longer geo-gated — but verify your billing country reflects a supported jurisdiction (US, EEA member states, UK, and the rest of Google Ads' global rollout).
  4. Pull the last 30 days of search-terms report data for the campaign. If you see a heavy concentration in exact and phrase match with limited query diversity, the campaign is exactly the profile Google says benefits most — up to 27% conversion lift in keyword-restricted accounts [5].
  5. Check whether an AI Max experiment has been run on the campaign in the past 90 days. Find this at Campaigns → Experiments. An experiment is the lowest-risk way to validate the lift on your own account before full rollout.

How to fix it

Total time: 15 minutes to enable, plus 14-28 days of experiment monitoring if you choose the experiment path.

  1. Decide between direct enablement and experiment-first. If the campaign spends more than approximately $5,000 per month or carries strategic weight, run an AI Max experiment for 14-28 days before full enablement. If the campaign is smaller or you have strong confidence in your conversion tracking and Smart Bidding signal, enable directly.

  2. For direct enablement on an existing campaign: open Campaigns → select your Search campaign → Settings → AI Max section → toggle on. Choose which sub-features to enable — search term matching and asset optimization are the two main levers [3]. Google recommends enabling both together so the system has the full set of signals to work with.

  3. Configure brand controls before save. Inside the AI Max settings panel, set:

    • Brand inclusions — campaigns that should only match queries related to your brand and approved partner brands.
    • Brand exclusions — competitor names and adjacent brands you do not want AI Max to match against.
    • Locations of interest — physical or service geographies you actually serve. This is critical for local and regulated verticals.

  4. Verify your negative-keyword layer is current. AI Max respects negative keywords [2], so a well-maintained shared negative list at MCC level remains your hard constraint on irrelevant queries. If negatives are stale, fix that before flipping the toggle. See Background: Negative keywords and Search Query Mining.

  5. For experiment-first path: navigate to Campaigns → Experiments → New experiment → choose AI Max experiment template. Set a 50/50 traffic split for 14-28 days, ensure the base campaign has at least 30 conversions in the trailing 30 days, and define your primary success metric (conversions at flat CPA, or conversion value at flat ROAS).

  6. Set creative ground rules. AI Max's asset optimization automatically generates and rotates headline/description variants. If you have regulatory copy constraints (financial services, healthcare, etc.) document those in your asset-level brand guidelines and pin any non-negotiable headlines before enabling.

How to confirm the fix worked

Diagnostic checklist — re-measure 14-48 hours after enable, full read at 14-28 days

  • AI Max toggle status = ON inside campaign settings (re-check after 24h to confirm setting persisted).
  • AI Max search-terms report populated within 48 hours — confirms the keywordless matching surface is delivering queries.
  • Conversion volume trending up versus the 14-day pre-enable baseline at flat or improved CPA/ROAS (this is the headline lift metric).
  • Impression volume rises 5-25% as the eligible auction pool widens — large jumps without conversion lift signal a brand-controls misconfiguration.
  • Negative-keyword spend share remains stable — AI Max should not bypass your negatives, but verify the search-terms report for new irrelevant patterns.
  • Smart Bidding learning status stable (no extended "Learning" period beyond 7 days post-enable). See Smart Bidding learning phase.
  • Brand inclusions/exclusions holding — periodically sample the search-terms report for competitor-brand bleed.

Re-run the Whitead audit — ai_max_eligible_not_enabled moves from failed → passed once the toggle is on and the campaign is collecting AI Max impressions.

Sequencing note. This finding is medium severity rather than high because the lift is incremental rather than corrective — the campaign is not broken, it is under-leveraging an available capability. Sequence the fix after any tracking, attribution, or negative-keyword findings have been resolved, because AI Max amplifies whatever signal it receives from your conversion stack. If conversion tracking is broken, AI Max will optimize toward noise. If negatives are missing, AI Max will spend faster on irrelevant queries than your previous setup did. The right order is: fix tracking → fix negatives → enable AI Max with brand controls scoped → run experiment or measure pre/post.

Co-occurrence pattern. Accounts flagged for ai_max_eligible_not_enabled very often also fire broad_match_without_smart_bidding (campaigns running broad match on Manual CPC) and brand_defense_campaign_exists (no dedicated brand campaign, so AI Max's brand inclusions/exclusions have nothing clean to anchor against). Fix those two first; AI Max becomes safer to enable once the surrounding hygiene is in place.

Sources

  1. Google Ads Help — About AI Max for Search campaigns. https://support.google.com/google-ads/answer/15910366 (accessed 2026-05-27)
  2. Google Ads Help — Frequently asked questions about AI Max for Search campaigns. https://support.google.com/google-ads/answer/15913066 (accessed 2026-05-27)
  3. Google Ads Help — How AI Max for Search campaigns works. https://support.google.com/google-ads/answer/15910187 (accessed 2026-05-27)
  4. Google blog — Get greater control and smarter optimization with AI Max as it expands globally. https://blog.google/products/ads-commerce/google-ai-max-expands-globally/ (accessed 2026-05-27)
  5. Google blog — Unlock next-level performance with AI Max for Search campaigns. https://blog.google/products/ads-commerce/google-ai-max-for-search-campaigns/ (2025-05-06, accessed 2026-05-27)
  6. Google Ads Developer Blog — Google Ads AI Max for Search campaigns Open Beta. https://ads-developers.googleblog.com/2025/05/google-ads-ai-max-for-search-campaigns-open-beta.html (2025-05-06, accessed 2026-05-27)
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