What is the difference between AI Brief and text guidelines?

Text guidelines were a control layer for shaping AI-generated ad copy. AI Brief includes messaging controls (which absorb and replace text guidelines) and adds matching and audience guidance. It is broader and more strategic. When AI Brief becomes available in your account, your existing text guidelines migrate automatically to the messaging guidelines section inside AI Brief.

Do I need to disable AI Brief if I want to manually control my ads?

No. AI Brief only affects AI-generated assets. Manually created ads in the same campaign are not affected.

Can AI Brief control which landing page users are sent to?

No. Landing page selection is governed by Final URL expansion, which is a separate setting. AI Brief does not interact with it.

Can AI Brief target specific audiences on its own?

No. Audience targeting is still set at the campaign level through your targeting settings and audience segments. Audience guidelines in AI Brief give the AI context to shape its messaging for the audiences you have already targeted - they do not expand or change who sees your ads.

Can I use AI Brief with Performance Max?

Not yet. Google confirmed AI Brief will expand to Performance Max and AI Max for Shopping after the initial AI Max for Search rollout completes.

What if the AI ignores my guidelines?

Use the preview step to review sample assets before going live. If the preview shows your guidelines are not being applied correctly, rewrite them to be more specific. Vague instructions are the most common reason AI Brief underperforms. After launch, review generated assets weekly.

How to Set Up Google AI Brief in Google Ads

Jul 2
10 min read

What Is Google AI Brief?

Google launched AI Brief on April 30, 2026, as part of its AI Max product updates announced at Google Marketing Live 2026.

Here is the plain definition: AI Brief is a feature within AI Max for Search campaigns that allows you to guide Google's ad AI using your own words - the same way you would brief a copywriter or an agency. Instead of configuring rigid settings, match types, and ad copy manually, you describe your business, your audience, and your rules in natural language.

The AI (powered by Gemini) reads your brief and uses it to shape what ads it creates, which searches it matches to your campaign, and how it adapts messaging for different audience types.

What AI Brief is not:

It is not a separate campaign type. It is a feature inside AI Max.
It is not a replacement for keywords, negative keywords, or audience targeting settings. Those still exist and still matter.
It does not affect manually created ads - only the ads the AI generates.
It does not control which landing pages users are sent to. That is governed by Final URL expansion settings separately.

Is AI Brief Available in Your Account?

This is important to check before anything else.

As of June 2026, AI Brief is still in the middle of its rollout. Google announced it would roll out in English for AI Max for Search campaigns "over the coming months" from the April 30, 2026 announcement date. Not every advertiser has access yet.

How to check: Go to your AI Max for Search campaign in Google Ads. If AI Brief is available in your account, you will see the option within the AI Max settings. If you do not see it, your account is still in the rollout queue.

If you have existing text guidelines in your AI Max campaign, those will automatically migrate to messaging guidelines inside AI Brief when it becomes available in your account. You will not need to re-enter them.

Prerequisites: Get These Right Before You Start

AI Brief does not fix a broken campaign. It amplifies what is already there. If the foundations are weak, the brief will optimize toward the wrong outcomes.

Check these before writing your brief:

Conversion tracking must be working correctly. Your GA4 key events need to be properly configured and importing into Google Ads. AI Max makes bidding decisions based on your conversion data. If that data is inaccurate, the AI optimizes toward noise.
Your campaign must have AI Max enabled. AI Brief exists only within AI Max for Search campaigns. If you are still running standard Search campaigns, AI Brief is not available to you yet.
You need clean first-party data where possible. Google's own data shows that advertisers who enrich AI Max campaigns with first-party data via Data Manager achieve an average +11% incremental ROAS. Upload your customer lists before writing your brief.
Know your actual business position before writing. AI Brief asks you to describe your product, your audience, and your brand rules. Vague answers produce generic ads. You need real clarity on your value proposition, your non-negotiables, and your target customer before you open the tool.

The Three Guideline Types in AI Brief

AI Brief organizes your input into three categories. Each one does a different job.

1. Messaging Guidelines

This is where you tell the AI what your ads should and should not say.
Messaging guidelines control ad copy - the tone, the claims, the restrictions, and the emphasis. You write them the way you would brief a copywriter. The AI interprets them and applies them to every ad it generates across all languages, even if your instructions are written in English.

You can add up to 40 messaging restrictions per campaign. Each restriction can be up to 300 characters.

What works:

"Never mention prices or discount percentages."
"Always lead with our quality guarantee, not price."
"Our brand tone is clear and direct - avoid casual or colloquial language."
"Do not describe our products as 'affordable' or 'budget-friendly'."
"Focus on our fall collection. Do not reference summer products."
"Never use exclamation marks."

What does not work:

"Keep it professional." (Too vague for the AI to interpret.)
"Good tone." (Meaningless as an instruction.)
"Be persuasive." (This is the default - it tells the AI nothing useful.)

Note on term exclusions (separate from messaging restrictions): AI Max also has term exclusions - exact words or phrases that must not appear in any AI-generated text. You get up to 25 term exclusions per campaign, each up to 30 characters. These are case-insensitive and language-specific. They work differently from messaging restrictions: if you exclude "low cost," the phrase "lowest cost" or "low-cost" will not automatically be blocked. You have to add variants individually. Use term exclusions for competitor brand names, specific words you need to block precisely. Use messaging restrictions for broader brand voice rules.

Also note: You cannot block price assets using the "$" symbol in term exclusions. That workaround does not work. Use a messaging restriction instead: "Don't generate assets with prices."

2. Matching Guidelines

This is where you set the boundaries for which searches you want your ads to appear in - and which ones you want to avoid.
AI Max expands keyword matching beyond your original keyword list using semantic understanding. Matching guidelines help you steer that expansion in a useful direction or keep it away from irrelevant territory.

Examples:

"Prioritize searches for premium skincare solutions, not drugstore alternatives."
"Avoid searches for in-person degrees - we are online only."
"Focus on searches by business owners evaluating software, not students."
"Match users interested in high-precision engine tuning."
"Avoid searches that imply free or trial versions."

Matching guidelines help in situations where your product serves multiple audiences but you want to prioritize a specific one, or where AI Max would naturally expand into search territory that is not commercially useful for your business.

3. Audience Guidelines

This is where you tell the AI who you are trying to reach and how you want the messaging adapted for them.
Audience guidelines do not replace your campaign-level audience targeting settings. They give the AI contextual information to shape how it frames messaging for different user types within your targeting scope.

Examples:

"For health-conscious users, highlight our clean ingredients and no-additive formulas."
"Reach first-time homebuyers. Emphasize ease and guidance over technical detail."
"Our buyer is a VP of Operations at a 200–500 person company. Speak to efficiency and compliance, not price."
"For users who have searched for competitor brands, lead with our guarantee and return policy."

The richer the audience context you provide, the more precisely the AI can adapt the message to match the user's likely intent.

Step-by-Step: How to Set Up AI Brief

Step 1: Check that AI Brief is available in your account Open Google Ads. Go to your AI Max for Search campaign. Look inside the campaign settings for the AI Brief option. If it is not there, your account is still in the rollout queue. Check back weekly - the rollout is ongoing as of June 2026.

Step 2: Gather your inputs before opening the tool Write out your business context, your non-negotiable rules, your target customer description, and the search types you want to capture or avoid. Do this outside the tool first. You will produce a better brief when you are not writing it in real time inside a form.

Step 3: Open AI Brief inside your AI Max campaign settings Once available, the AI Brief option appears in your AI Max for Search campaign. Click into it.

Step 4: Write your Messaging Guidelines Enter your messaging restrictions one at a time. Use clear, directive language - "always," "never," "focus on," "avoid." Aim for specificity. Each restriction should be unambiguous. You have 40 slots (300 characters each). Do not fill all 40 with vague rules. Ten sharp, specific rules are better than 40 soft ones.

If you have existing text guidelines in the campaign, they will have already migrated here automatically. Review them - they may need to be rewritten now that you have more space and context to work with.

Step 5: Write your Matching Guidelines Describe the search territory you want to prioritize and the territory you want to stay out of. Think about the search behaviors of your best customers versus searches that look related but convert poorly. Be concrete: name specific themes, topics, or intent signals to include or exclude.

Step 6: Write your Audience Guidelines Describe who you are trying to reach and - importantly - how you want the messaging adapted for them. If your product appeals to different user types, specify how the emphasis should shift for each segment. A financial product might need different framing for new investors versus business owners.

Step 7: Review the AI's preview This step is built into the tool. Before any ads are shown, AI Brief generates sample assets and sample searches based on your guidelines. Review them carefully. This is your chance to spot misinterpretations, off-brand copy, or search territory you did not intend to open up. Provide feedback and iterate. Only proceed when the preview reflects your intent accurately.

Step 8: Set a review cadence and launch Before going live, set a fixed review schedule - weekly for the first month is the standard recommendation from practitioners. You will want to check search term reports, generated assets, conversion quality (not just quantity), and landing page alignment. The brief is a working document. Plan to update it based on what you learn.

Key Limits and Specifications

Setting	Limit	Notes
Messaging restrictions	40 per campaign	300 characters each. Cross-language - apply to all languages the campaign runs in.
Term exclusions	25 per campaign	30 characters each. Language-specific. Case-insensitive.
Matching guidelines	No published character limit	Plain language. Be specific.
Audience guidelines	No published character limit	Plain language. Can be written as segments.
Language availability	English only (currently)	Expanding to other languages - no confirmed timeline as of June 2026.
Campaign types	AI Max for Search (now). Performance Max and AI Max for Shopping (rolling out after).

Common Mistakes to Avoid

Writing guidelines that are too vague "Keep it professional" does not give the AI anything to work with. "Do not use slang, exclamation marks, or sentence fragments" does. Be specific enough that a new employee could follow the rule without asking for clarification.
Burning term exclusion slots on translations Term exclusions are language-specific. If you need to block a word across English, Hindi, and French, use a messaging restriction - it is cross-language and covers all three in one line. Save your 25 term exclusion slots for English-specific compliance terms or competitor brand names.
Blocking prices using "$" as a term exclusion This does not work. Use the messaging restriction: "Don't generate assets with prices." That is the confirmed workaround from Google's own documentation.
Treating the brief as a one-time task AI Max expands match dynamically. Your guidelines need to evolve as search term reports reveal where the AI is going. Set a fixed date to review and update your brief - treat it like any other campaign optimization task.
Writing brand-book language instead of clear instructions Brand guides are written for humans who bring context and judgment. AI Brief needs instructions, not philosophy. "We are a purpose-led brand committed to transparency" is not actionable. "Never describe our products as 'fast' or 'cheap'" is.
Expecting AI Brief to fix poor measurement If your conversion tracking is inaccurate, AI Brief cannot save the campaign. Fix your GA4 and conversion import setup first.

Does It Actually Work? The Data

AI Brief is a new feature (announced April 30, 2026), so independent controlled studies are limited. Here is what is confirmed from Google's own data and verified case studies:

AI Max for Search campaigns (with text guidelines enabled) show an average 14% conversion lift at similar CPA compared to Search campaigns without AI Max. (Source: Google, 2026)
For campaigns that previously relied heavily on exact and phrase match keywords, the lift reaches up to 27% more conversions. (Source: Google, 2026)
L'Oréal reported a doubling of conversion rate and a 31% reduction in cost per conversion after implementing AI Max. (Source: Google/ALM Corp)
MyConnect (Australian utility service) reported 16% more leads at 13% lower cost per action, with 30% of those conversions coming from search queries the campaign had never previously matched. (Source: ALM Corp, citing Google data)
BYD reported 24% more leads at 26% lower cost per lead using AI Max. (Source: Digital Applied, citing Google data)

Important transparency note: These results are for AI Max with text guidelines, not AI Brief specifically (which is newer and still rolling out). AI Brief is designed to give you more governance over the same AI system. The results above represent the ceiling of what AI Max can do when properly instructed. AI Brief is Google's attempt to make that instruction layer more complete and accessible.

FAQ (Frequently Asked Questions)

What is the difference between AI Brief and text guidelines? Text guidelines were a control layer for shaping AI-generated ad copy. AI Brief includes messaging controls (which absorb and replace text guidelines) and adds matching and audience guidance. It is broader and more strategic. When AI Brief becomes available in your account, your existing text guidelines migrate automatically to the messaging guidelines section inside AI Brief.
Do I need to disable AI Brief if I want to manually control my ads? No. AI Brief only affects AI-generated assets. Manually created ads in the same campaign are not affected.
Can AI Brief control which landing page users are sent to? No. Landing page selection is governed by Final URL expansion, which is a separate setting. AI Brief does not interact with it.
Can AI Brief target specific audiences on its own? No. Audience targeting is still set at the campaign level through your targeting settings and audience segments. Audience guidelines in AI Brief give the AI context to shape its messaging for the audiences you have already targeted - they do not expand or change who sees your ads.
Can I use AI Brief with Performance Max? Not yet. Google confirmed AI Brief will expand to Performance Max and AI Max for Shopping after the initial AI Max for Search rollout completes.
What if the AI ignores my guidelines? Use the preview step to review sample assets before going live. If the preview shows your guidelines are not being applied correctly, rewrite them to be more specific. Vague instructions are the most common reason AI Brief underperforms. After launch, review generated assets weekly.

Summary: What to Do Right Now

If you run Google Ads and have AI Max for Search enabled, check whether AI Brief has appeared in your campaign settings. If it has, start with your messaging restrictions - that is where most brands have the clearest guardrails to set. Write them like instructions to a copywriter, not philosophy from a brand guide.

If AI Brief is not yet available in your account, use the time to prepare: clean your conversion tracking, set up first-party data uploads, and write out your messaging, matching, and audience guidelines in a document so you can move fast when access arrives.

AI Brief does not replace strategic thinking. It gives your strategic thinking a direct path into the machine.

Published by DigiQuick Creative Lab | digiquick.in