Google AI Brief: How to Give AI Max Better Campaign Instructions

Google AI Brief lets advertisers guide AI Max for Search with natural-language instructions about the business, message, audience and searches to pursue or avoid. The best brief is specific enough to protect strategy but flexible enough to let Google find relevant demand. It should define business truth, boundaries and priorities rather than prescribe every keyword or headline.

This is a meaningful change in paid media operations. Campaign quality increasingly depends on the instructions and source information given to AI, not only the settings selected in a menu.

What is Google AI Brief?

Google describes AI Brief as a Gemini-powered way to steer AI Max for Search campaigns using your own words. Google says Performance Max and AI Max for Shopping support will follow.

The current framework includes three instruction types:

• Messaging guidelines: what ads should emphasize or avoid saying.
• Matching guidelines: searches and intent the campaign should pursue or avoid.
• Audience guidelines: who should see the message and which benefits matter to them.

Google then previews sample assets and searches so the advertiser can review the direction before relying on it.

Start with business truth, not ad copy

An AI brief should first document facts the system must not improvise. Include the offer, eligibility rules, service area, product limitations, pricing policy and primary conversion. This is especially important for regulated industries, complex services and lead-generation accounts.

A useful foundation might say: “We provide online accounting software for US businesses with 10 to 200 employees. The primary goal is a qualified demo request. Do not imply that the product files taxes automatically.”

That is more valuable than pasting a list of generic headlines because it helps the model understand what a relevant customer and accurate claim look like.

Write strong messaging guidelines

Define the central promise

Choose one customer problem and one defensible benefit. If five benefits are treated as equally important, generated ads may become vague.

Protect prohibited claims

List claims that require legal approval, prices that should not be mentioned and guarantees the company does not make. Use direct instructions such as “Never describe the service as free” or “Do not promise approval.”

Preserve brand language

Specify important product names, preferred terminology and words the brand avoids. This complements the text controls discussed in Google Ads AI Max Is Changing in September 2026.

Use matching guidelines to describe intent

Do not turn matching guidance into a giant keyword list. Describe the problem, stage of consideration and exclusions that define a valuable search.

For a university program, useful guidance might be:

• Pursue searches from working professionals comparing accredited online graduate programs.
• Avoid searches about free courses, undergraduate admissions and local in-person classes.
• Prioritize users asking about schedule flexibility, tuition and employer reimbursement.

Review the sample searches carefully. If Google interprets a boundary incorrectly, rewrite the instruction rather than assuming the model will infer the intended nuance later.

Make audience guidance actionable

Audience instructions should connect a segment to a message. “Target small businesses” is too broad. “For owner-led businesses without an internal finance team, emphasize simple setup and accountant collaboration” gives the system something useful to do.

Avoid unsupported demographic assumptions. Define audiences through needs, situations and buying constraints whenever possible.

Do not confuse the brief with measurement

A well-written brief can improve relevance, but it cannot repair weak conversion data. AI Max still needs outcomes that reflect qualified leads, revenue or profit. The process in How to Train AI Bidding With Profit and Lead-Quality Signals explains how to improve those signals.

Keep creative direction and outcome measurement connected:

1. Brief the system on the right customer and promise.
2. Import the downstream result that defines value.
3. Review search terms, assets and landing pages.
4. Compare performance with a controlled experiment when possible.

A practical AI Brief template

• Business: what the company sells and where.
• Customer: the situation, need and qualification criteria.
• Goal: the primary conversion and downstream business outcome.
• Message: the core benefit and supporting proof.
• Do not say: restricted claims, prices or terminology.
• Pursue: valuable search situations and buying stages.
• Avoid: irrelevant intent, audiences and use cases.
• Audience-message pair: which benefit matters to each priority group.

Frequently asked questions

Does Google AI Brief replace keywords?

No. It adds a natural-language steering layer to AI Max. Advertisers should still review the campaign’s search behavior, controls and available reporting.

Should the brief include every brand rule?

Include rules that materially affect accuracy, compliance or positioning. A separate brand document can remain the complete reference.

How often should an AI Brief be updated?

Review it when the offer, market, customer qualification or campaign objective changes. Do not rewrite it after every short-term performance fluctuation.

Sources

• Google: AI Brief, accessed September 9, 2026
• Google Marketing Live 2026 product announcements