Google on April 30, 2026, announced AI Brief, a new feature inside AI Max for Search campaigns that allows advertisers to provide natural-language instructions to guide how the AI generates ads and targets searches. The announcement, published by Brandon Ervin, Director of Product Management at Google Ads, was released alongside the first-anniversary milestones for AI Max and positions AI Brief as a fundamental shift in how advertisers interact with automated campaign systems - moving from structured settings and dropdown controls toward freeform text input powered by Gemini.

What AI Brief does

AI Brief is described in the announcement as offering "a new way to use your own words to steer AI Max." The core premise is that advertisers can supply rich context about their business, their messaging, and the audiences they want to reach - in plain language - and the AI will incorporate those inputs when generating assets and selecting searches.

According to the announcement, AI Brief is organised into three distinct input categories.

Messaging guidelines govern what the AI should and should not say in generated ad copy. The example provided is concrete: an advertiser can instruct the system to "never mention prices." This functions as a creative constraint - not a keyword exclusion or a negative list, but a content boundary expressed conversationally. It addresses the long-standing concern that AI-generated headlines and descriptions can drift from brand standards in unpredictable ways.

Matching guidelines allow advertisers to define the search territory the campaign should prioritise or avoid. The example from the announcement is "prioritize searches for healthy pantry staples." This input sits at the intersection of targeting and brand positioning: it does not prevent the AI from expanding beyond those terms, but it sets a stated priority that the system is expected to weigh. It is a softer mechanism than URL exclusions or negative keywords - closer to a brief given to a media planner than a hard technical filter.

Audience guidelines introduce a layer of personalisation at the brief level. The example - "for people who are health conscious, highlight our clean products" - demonstrates the format: an audience description paired with a messaging instruction. The system is expected to serve tailored messages to the described segment rather than applying generic copy across all triggered searches.

The preview loop

One detail in the announcement that distinguishes AI Brief from earlier control features is the inclusion of a preview step. According to the announcement, AI Brief "keeps you in the driver's seat by sharing previews of sample assets and searches so you can provide feedback and iterate before you commit."

This is a meaningful structural difference from the existing text guidelines feature, which went global on February 26, 2026 and operates as a constraint layer applied after the campaign is live. With text guidelines, advertisers set exclusions - up to 25 term exclusions and 40 messaging restrictions per campaign - and then observe whether the output conforms, primarily through asset reporting. The feedback loop is retrospective.

AI Brief inserts a review step before activation. Advertisers can see sample assets and the types of searches the system plans to target, then adjust the brief inputs before the campaign goes live. That upstream feedback mechanism is closer to the working relationship an advertiser might have with a copywriter or media planner than to a settings panel. How reliably the preview reflects actual live behaviour is not addressed in the announcement.

Relationship to text guidelines

The announcement notes that when advertisers begin using AI Brief, "your existing text guidelines will automatically move to messaging guidelines within AI Brief." That migration is significant because it means AI Brief subsumes the earlier control framework rather than running alongside it. Text guidelines - which PPC Land has tracked since their September 2025 introduction at Think Week and their global expansion in February 2026 - become one component of a broader input system rather than a standalone feature.

Text guidelines addressed a narrower problem: they constrained language in AI-generated copy through exclusion lists. AI Brief operates on a wider canvas. It allows positive framing - telling the system what to say, who to reach, and which searches to prioritise - rather than only specifying what to avoid. Whether the underlying AI mechanism for processing these instructions is materially different from how term exclusions work is not disclosed in the announcement.

Rollout plan

According to the announcement, AI Brief will roll out in English for AI Max for Search campaigns over the coming months. Following that initial phase, it will expand to Performance Max and AI Max for Shopping campaigns. No specific timeline is given beyond "over the coming months" for the English Search rollout or for the subsequent expansion to other campaign types.

The English-first approach mirrors the February 2026 text guidelines global expansion, which began with a restricted rollout before reaching full language support. For advertisers outside English-speaking markets, the practical availability of AI Brief remains uncertain for the near term.

The sequencing - Search first, then Performance Max, then AI Max for Shopping - reflects the order in which AI Max features have generally been introduced across campaign types. Performance Max received text guidelines support at the same time as AI Max for Search in the February 2026 global rollout, but the underlying architecture differs between the two campaign types. For Performance Max, text guidelines sit within the brand guidelines section of campaign settings. For Search campaigns with AI Max, the option appears beneath the asset optimisation panel. AI Brief is likely to follow a similar pattern, with the interface placement adapting to the specific campaign type structure.

Why this matters for the industry

The tension between automation and advertiser control has run through every major AI Max development since the product launched at Google Marketing Live in May 2025. PPC Land documented early concerns in August 2025 when analysts flagged aggressive Search Partner Network expansion patterns. Independent testing published in November 2025found AI Max delivering conversions at approximately 35% lower return on ad spend than traditional match types across more than 250 retail campaigns, with one four-month test showing a cost per conversion of $100.37 under AI Max versus $43.97 for phrase match.

Those performance findings were accompanied by a transparency problem: it was difficult for advertisers to understand why AI Max was making specific targeting and creative decisions, and the existing controls - negative keywords, URL exclusions, text guidelines - were primarily defensive. They defined what the system should not do.

AI Brief attempts to address the other side of that equation. Positive instructions about messaging, search priorities, and audience targeting give advertisers a way to express intent rather than only restrictions. Whether the Gemini model processing those instructions produces outputs meaningfully different from what the system would generate without them is a question the industry will need to test empirically once AI Brief begins rolling out.

The preview mechanism - sample assets and search previews before commitment - adds an accountability layer that has been largely absent from AI Max's operation. PPC Land's coverage of the DSA-to-AI Max migration announced on April 15, 2026, noted that advertisers managing high-volume accounts with complex targeting requirements have had limited tools for verifying how the system will behave before it begins spending budget. A structured preview step does not resolve the fundamental question of whether AI Max targets the right searches, but it creates a checkpoint that did not exist before.

The announcement also describes AI Brief as being powered specifically by Gemini - the same model family underpinning Google's broader marketing platform integration, Asset Studio, and the conversational campaign creation experience that Google has been expanding since 2024. Positioning AI Brief as a Gemini-powered feature aligns it with a broader narrative about natural-language interfaces replacing form-based controls across the Google Ads platform.

The migration of existing text guidelines into AI Brief's messaging guidelines section means the transition will happen automatically for advertisers already using the earlier feature. That reduces friction for adoption but also means advertisers will need to review their existing text guidelines to understand how they translate within the new framework, particularly given that AI Brief introduces positive instructions - what to say and who to reach - alongside the existing exclusion logic.

Text disclaimers: a related compliance feature

The April 30 announcement also introduced text disclaimers, a compliance tool separate from AI Brief but relevant to advertisers using final URL expansion (FUE). Final URL expansion routes users to the most relevant landing page on an advertiser's site for each individual search, regardless of the destination URL specified in the ad itself. Regulated industries - financial services, pharmaceuticals, legal services - frequently require mandatory disclosure text in all ads. Previously, that requirement was incompatible with final URL expansion, because the system's dynamic destination selection made it technically impossible to guarantee that required text would always appear.

Text disclaimers resolve that conflict. According to the announcement, they "guarantee that required text always appears in your ads - even when using final URL expansion." The feature is rolling out in the coming weeks. For regulated advertisers, this removes a blocker that had effectively forced a choice between using FUE - and its associated AI-driven landing page optimisation - and meeting legal disclosure requirements.

Timeline

Summary

Who: Google, announced by Brandon Ervin, Director of Product Management, Google Ads. The changes affect all advertisers using AI Max for Search campaigns globally, with regulated-industry advertisers specifically affected by the text disclaimers update.

What: AI Brief is a Gemini-powered interface inside AI Max that accepts natural-language instructions across three input types - messaging guidelines, matching guidelines, and audience guidelines. It includes a preview step showing sample assets and searches before campaign activation. Existing text guidelines migrate automatically into AI Brief's messaging guidelines section. A separate feature, text disclaimers, enables mandatory compliance text to appear in ads that use final URL expansion - a combination previously impossible.

When: Announced April 30, 2026. AI Brief will roll out in English for AI Max for Search campaigns over the coming months, followed by Performance Max and AI Max for Shopping campaigns. Text disclaimers are rolling out in the coming weeks.

Where: AI Brief applies to AI Max for Search campaigns globally, with English-language rollout first. The text disclaimers feature affects regulated-industry advertisers running Search campaigns with final URL expansion enabled.

Why: Advertiser control over AI-generated ad output and targeting behaviour has been a recurring concern throughout AI Max's first year. AI Brief introduces a positive-instruction layer - telling the system what to do and who to reach, not only what to avoid - and adds a pre-activation preview mechanism that previous AI Max controls lacked. Text disclaimers address a specific compliance blocker that prevented regulated advertisers from combining final URL expansion with mandatory disclosure requirements.

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