AI Max for Search Ads: What It Is and How It Works
Google has rolled out AI Max for Search Ads, a new campaign type that uses Gemini models to expand keyword targeting, dynamically generate ad creative, and steer incoming search queries toward an advertiser’s landing pages. The feature sits inside Google Ads as a one-click upgrade from standard Search campaigns, and Google is pitching it as a way for advertisers to reach searches their keyword lists have been missing.
What is AI Max for Search Ads?
AI Max for Search Ads is a campaign-level setting in Google Ads that layers generative AI capabilities on top of a traditional Search campaign. It was launched in beta at Google Marketing Live 2025 and began general availability in late 2025. Unlike Performance Max, which spans Search, YouTube, Display, Discover, Gmail, and Maps, AI Max stays within Search inventory. Google frames it as the Search-network equivalent of the automation PMax brought to broader inventory.
The product combines three feature sets: keyword and URL expansion, dynamic ad creative, and query steering through landing-page matching. Each can be toggled on or off within a campaign, giving advertisers some control over how aggressively the system deviates from their original keyword and ad setup.
How does keyword and URL expansion work?
Keyword expansion, which Google calls Search Term Matching, lets the system match ads to queries that do not exactly contain the advertiser’s keywords. It pulls from landing-page content, existing keyword lists, and Google’s understanding of which searches are commercially relevant. Google says AI Max can scan landing pages for products, services, and categories that are not explicitly named in the keyword list and then bid on the queries that signal intent for those items.
URL expansion takes the same logic further. When an advertiser toggles URL Expansion on, the system can serve ads for a product or service landing page even when the query is more loosely related. An advertiser selling running shoes, for example, could have ads show up for queries about trail gear if the system reads the running-shoes landing page as relevant to that intent.
Google reports that early adopters are seeing 14% more conversions on AI Max for Search Ads compared with standard Search campaigns, attributed in part to this broader matching.
How does AI Max generate ad creative?
The creative layer is built on Gemini. Advertisers add text customization, headlines, descriptions, and business descriptions to their campaigns, and the system assembles ad combinations at serving time, pairing them with the user’s query and intent signals. Google describes this as a step beyond Responsive Search Ads, because the inputs are broader and the model can synthesize from the full asset set rather than only from headlines and descriptions written specifically for ads.
Text customization can pull from a page title, a category description, or a short business description submitted by the advertiser. Google says the goal is to reduce the manual work of writing dozens of headline variations while keeping ads relevant to the underlying landing page.
What is query steering and how does landing-page matching work?
Query steering is the third pillar. With Landing Page Matching on, AI Max selects the best destination URL on an advertiser’s site for each query, rather than always sending clicks to the URL the advertiser manually chose. If a user searches for a specific product feature, the system can route them to the product detail page that mentions that feature rather than the site’s homepage.
Advertisers can opt out at the keyword level if there are queries they want kept on a specific URL. URL Expansion is a separate setting that lets the system generate ads around URLs the advertiser has not explicitly included. Both controls are exposed in the Google Ads UI under the AI Max panel.
How do advertisers track AI Max performance?
Google has updated reporting to give advertisers a view of AI Max’s incremental contribution. Two new columns in the Search Terms report show which queries were matched by AI Max rather than by the advertiser’s existing keywords. A new AI Max report in the Campaigns section groups results by feature: keyword expansion performance, URL expansion performance, and dynamic creative performance, so advertisers can see which lever is driving lifts.
Advertisers retain control over negatives, brand exclusions, and budget. The campaign’s existing rules of bid, audience, and budget continue to apply; AI Max changes the inputs, not the spend caps.
How does AI Max compare with broad match and Performance Max?
AI Max builds on broad match, which has been available for years, but adds the creative and URL-rotation layers. Broad match alone widens query matching without rewriting ads or choosing landing pages. AI Max widens matching, rewrites ad copy on the fly, and picks the URL.
Versus Performance Max, AI Max is limited to Search inventory and does not place ads on YouTube, Display, Gmail, Discover, or Maps. PMax is the cross-inventory option; AI Max is the Search-network option. Advertisers who want control over where their search ads appear and which queries they match should consider AI Max; advertisers who want full-funnel, cross-channel automation should look at PMax.
Who should consider AI Max for Search Ads?
Google positions AI Max for advertisers with large keyword inventories, long-tail landing-page catalogs, or product feeds that are too granular to write individual ads for. Advertisers running tight, brand-led campaigns with carefully tuned keyword lists may find AI Max’s expansion logic too permissive.
The toggle structure means a brand can run an AI Max-enabled Search campaign alongside a traditional exact-match brand campaign without overlap, comparing incremental conversions and adjusting the AI Max toggles based on the Search Terms report data.
FAQ
What is AI Max for Search Ads?
AI Max for Search Ads is a Google Ads campaign setting that uses Gemini to broaden keyword matching, generate ad copy dynamically, and steer queries to the most relevant landing page on an advertiser’s site. It runs only on Search inventory.
When did AI Max for Search Ads launch?
Google introduced AI Max for Search Ads in beta at Google Marketing Live 2025 and began rolling it out to general availability in late 2025.
How is AI Max different from Performance Max?
AI Max only serves ads on Search, while Performance Max places ads across Search, YouTube, Display, Discover, Gmail, and Maps. AI Max also gives advertisers per-feature toggles for matching and URL expansion that PMax does not expose.
This article summarizes reporting from searchengineland.com.