AI Max for Search
A suite of Google AI features within Search campaigns that automatically expands keyword matching, generates ad headlines, and routes traffic to the most relevant landing page.
After enabling AI Max, your Search campaign starts triggering on queries outside your keyword list. Google writes new headlines from your landing page content. Traffic routes to the most relevant URL on your site, not necessarily the one you specified in the ad.
AI Max is a campaign-level setting you enable within an existing Search campaign. It bundles three capabilities: search term matching (keywordless expansion beyond your current keywords), text customization (auto-generated headlines from your domain and landing pages), and Final URL Expansion (routing each query to the most relevant page on your site).
How it shows up in the wild
Royal Canin (pet nutrition, 2025): Conversion value lifted 161% and ROAS rose 25% within one month. The gain came from AI Max capturing care-advice queries like “how many times a day to feed a puppy.” These searches fell entirely outside the brand’s existing keyword coverage.
Lufthansa Group (airline, with Publicis Media): Destination-specific campaigns cut by 66%, ROAS lifting 24% at a lower CPC. The previous structure required a separate campaign for each route. AI Max collapsed that into query-level matching.
Why it matters
D2C brands often use exact and phrase match keywords to control which queries trigger spend. AI Max replaces that control with query expansion the account cannot fully audit. Campaigns still mostly using exact and phrase keywords see up to 27% conversion lift when AI Max is enabled, per Google’s benchmarks.
My hunch is that the trade-off sharpens at thin margins. Exploratory queries tend to convert at lower rates. Accounts without strong negative keyword coverage absorb that cost before the volume upside materializes.
Related terms
- Performance Max — Google’s cross-surface AI campaign type; AI Max for Search applies similar expansion within Search only
- Smart Bidding — the bid strategy layer; AI Max expands which queries trigger the bid, Smart Bidding decides what to bid
- Search Intent — the underlying user goal; keywordless matching targets intent signals beyond keyword syntax
- Dynamic Creative Optimization — Meta’s version of auto-assembling ad elements; AI Max’s text customization applies a similar logic to Search headlines
Frequently asked questions
Is AI Max for Search the same as Performance Max? No. Performance Max runs across Search, Display, YouTube, Shopping, and Discover from a single campaign. AI Max for Search applies similar query expansion inside an existing Search campaign only, without changing the campaign type.
Do negative keywords still work with AI Max? Yes. Negative keywords remain effective constraints on AI Max’s search term expansion. Brand inclusions and exclusions also persist.
Will Google auto-enable AI Max on my campaigns? Google began auto-migrating Dynamic Search Ads campaigns to AI Max in 2026. Standard Search campaigns are not auto-enrolled as of mid-2026. Google has signaled AI Max will become the default for Search over time.