Performance Max negative keywords are exclusions you apply to prevent Google's fully automated PMax campaigns from spending your budget on irrelevant searches, low-quality placements, and audiences that will never convert. Unlike standard Search campaigns, Performance Max does not give you direct, granular control over where your ads appear, which makes exclusion management one of the most important levers you have for controlling PMax spending in 2026.
This guide walks you through every practical method for applying negative keywords, placement exclusions, brand exclusions, and audience signal refinements to your Performance Max campaigns. By the end, you will have a repeatable system for cutting wasted spend without crippling the reach that makes PMax valuable in the first place.
What you will need before starting:
- An active Google Ads account running at least one Performance Max campaign
- Access to the Search Terms Insight report (available in the Insights tab)
- A Google Ads rep or the ability to submit requests through the Google Ads support portal
- Admin-level access to the account (some exclusion methods require it)
Before You Start: Know What PMax Actually Controls
Performance Max campaigns run across every Google Ads inventory surface: Search, Shopping, Display, YouTube, Discover, Gmail, and Maps. Google's automation decides which queries, placements, and audiences see your ads. You do not pick keywords. You do not choose individual placements. This is the trade-off for PMax's scale, and it is the reason exclusion management matters so much.
The critical thing to understand is that PMax's exclusion controls are not symmetrical with standard campaigns. You cannot simply add negative keywords in the campaign settings the way you would in a Search campaign. Each exclusion type has its own method, its own limitations, and its own workarounds. The steps below cover each one in the order you should implement them.
Step 1. Understand What PMax Does And Does Not Expose
The first action is to map out exactly which levers Google gives you and which ones it withholds. This prevents you from wasting time trying to configure something that does not exist yet in the PMax interface.
What PMax exposes:
- Search Terms Insight reports (aggregated, not exhaustive)
- Asset group-level audience signals
- Campaign-level placement exclusions (added in late 2023, expanded since)
- Account-level negative keyword lists (applied via rep or API)
- Brand exclusions at the campaign level
What PMax does not expose:
- Full, query-level search term data for every impression
- Individual bid adjustments by keyword or placement
- Network-level opt-outs (you cannot turn off Display or YouTube inside a PMax campaign)
- Real-time negative keyword application from the campaign settings UI
Knowing these boundaries up front means you will not try to force a standard Search workflow onto a PMax campaign. Every step that follows works within these constraints.
Why This Matters
Advertisers who treat PMax like a standard Search campaign spend weeks looking for controls that do not exist. The result is frustration and, worse, continued wasted spend while they search for a button that is not there. Start with the map, then work the territory.
Step 2. Use Search Term Insight Reports To Find Irrelevant Traffic
Open your Performance Max campaign, navigate to the Insights tab, and pull the Search Terms Insight report. This report groups your search traffic into "search categories" and "search terms" clusters, showing you the themes Google is matching your ads against.
Go through every category and every visible term. Flag anything that is clearly irrelevant to your offer: wrong intent, wrong industry, wrong geography, informational queries you do not want to pay for, or competitor terms you are not deliberately targeting.
Export the data. Build a running spreadsheet with columns for the irrelevant term, the category it appeared under, the spend associated with it, and the action you plan to take (negative keyword, placement exclusion, or signal adjustment). This spreadsheet becomes your exclusion backlog.
Common Pitfall
The Search Terms Insight report does not show every query that triggered an impression. Google aggregates and omits low-volume queries. This means the report is necessary but not sufficient. You are seeing a filtered view. Accept this limitation and supplement it with the steps that follow, but do not skip this step because it is incomplete. It is still the richest source of PMax search data you have.
If you find that vanity metrics are clouding your judgment on which terms are actually wasting spend versus which ones just look expensive, fix your measurement framework before building exclusion lists.
Step 3. Request Account-Level Negative Keyword Lists From Your Rep (The Manual Route)
Take the irrelevant terms from your backlog and compile them into a negative keyword list. Then contact your Google Ads rep (or submit a request through the Google Ads support chat) and ask them to apply the list as account-level negatives that affect your Performance Max campaigns.
This has been the primary method for adding negative keywords to PMax since its launch. Google has gradually opened up self-serve options, but the rep-assisted route remains the most reliable way to apply broad negative keyword lists across PMax campaigns.
When submitting the request, be specific. Provide the exact keywords, the match types you want (broad match negative, phrase match negative, or exact match negative), and which campaigns should be affected. Reps process these faster when the request is clean and unambiguous.
Pro Tip
Build your negative keyword list in the shared library of your Google Ads account first. This way, the rep can apply an existing list rather than creating one from scratch, and you retain visibility into what was added. If you later gain direct self-serve access to PMax negatives (Google has been expanding this), your list is already structured and ready to migrate.
Step 4. Apply Campaign-Level Exclusions Where Available
Google has rolled out campaign-level negative keyword functionality for Performance Max in phases. Check your campaign settings for the "Negative keywords" option under "Additional settings." If it is available in your account, use it directly.
Add the same terms from your backlog here. Prioritize the highest-spend irrelevant terms first. Apply exact match negatives for specific queries you want to block completely, and phrase match negatives for broader themes (like "free," "jobs," "salary," or "DIY" if you sell a premium service).
If the option is not yet visible in your account, you are limited to the rep-assisted route from Step 3. Google has been rolling this out progressively, so check again each month.
Why This Matters
Campaign-level negatives give you faster iteration cycles than waiting for a rep. When you spot a new irrelevant term, you can block it the same day instead of waiting 48 to 72 hours for a support request to process. Speed matters because every day a bad query runs is another day of wasted budget.
Step 5. Use Placement Exclusions To Stop PMax From Burning Display Budget
Navigate to your Google Ads account, go to Content, then Exclusions, and add placement exclusions at the account level. This is where you block specific websites, apps, YouTube channels, and app categories from showing your PMax ads.
Start with the known offenders. Mobile game apps and children's content apps are the most common sources of accidental PMax Display and Video spend. Add these categories to your exclusions list:
- Games (all subcategories)
- Apps designed for children
- Parked domains
- Error pages
- Any specific sites or apps you have identified as low-quality placements in your Placement report
Check the "Where ads showed" report under Insights to find the specific placements PMax has been using. Sort by cost and look for placements with high spend and zero conversions. Add those to your exclusion list.
Common Pitfall
Many advertisers forget that PMax placement exclusions only work at the account level, not the campaign level. If you are running multiple PMax campaigns with different goals, your exclusions will apply to all of them. Plan accordingly. If a placement is irrelevant for one campaign but valuable for another, you have a structural problem that exclusions alone cannot solve, and you may need to rethink your campaign architecture.
For ecommerce brands running PMax alongside standard Shopping, understanding how these campaign types interact is critical before layering in exclusions that could affect both.
Step 6. Block Brand Terms From Cannibalizing Branded Search Campaigns
One of the most common PMax budget leaks is brand cannibalization. PMax will happily bid on your own brand terms and claim credit for conversions that your branded Search campaign would have captured at a fraction of the cost.
Go to your PMax campaign settings and find the Brand Exclusions option. Add your own brand name and all common misspellings, abbreviations, and variations. This forces PMax to stop bidding on branded queries and leaves that traffic to your dedicated branded Search campaign, where CPCs are lower and control is higher.
If you are deliberately running PMax for brand terms (some accounts do this intentionally for Shopping coverage on branded queries), be selective. Exclude the pure navigational brand terms (just your company name) while allowing branded product queries to flow through PMax.
Pro Tip
After applying brand exclusions, monitor your branded Search campaign closely for two weeks. You should see impression volume return to that campaign. If it does not, verify the exclusions are active and check whether PMax is matching on close brand variants that were not in your exclusion list. Google's matching can be aggressive, so include every reasonable variation.
Step 7. Monitor Asset Group Signals To Tighten Audience Intent
Asset group audience signals are not exclusions, but they function as a steering mechanism. Navigate to each asset group within your PMax campaign and review the audience signals you have set.
Tighten these signals by adding more specific custom segments built from high-intent keywords and URLs. Remove any overly broad signals like large in-market audiences that are pulling in users with weak intent. The more precise your signals, the narrower the pool of users PMax starts its optimization from, which reduces the volume of irrelevant traffic you need to exclude after the fact.
This is proactive exclusion management: instead of waiting for bad traffic and blocking it, you are reducing the probability of bad traffic in the first place.
Why This Matters
Audience signals are "suggestions," not hard constraints. Google can and will go beyond them. But stronger signals give the algorithm a better starting point, and campaigns with tight signals consistently show lower wasted spend in the Search Terms Insight report than campaigns with vague or missing signals. This step compounds the effect of every other exclusion you have applied.
Step 8. Set Up A Recurring Audit Cadence So Exclusions Stay Current
Create a recurring calendar event: weekly for high-spend accounts, biweekly for smaller ones. During each audit, pull the Search Terms Insight report, review the "Where ads showed" placement report, and check whether your brand exclusions are still covering all relevant terms.
Add any new irrelevant terms or placements to your exclusion lists. Remove negatives that may have become overly restrictive (occasionally a negative keyword blocks a query that turns out to be valuable). Document every change in your exclusion backlog spreadsheet.
This is not optional. PMax's automation continuously explores new queries and placements. An exclusion list that was complete last month will have gaps this month. The only way to maintain control is to treat exclusion management as an ongoing operational task, not a one-time setup.
A thorough account audit framework should include PMax exclusion health as a standard checkpoint. If your audits do not cover PMax exclusions, you are missing one of the largest sources of hidden waste.
The Limits You Cannot Work Around (And How To Manage Them)
Even after implementing every step above, there are hard constraints in PMax that no workaround can solve:
- No network-level opt-outs. You cannot tell PMax to stop running on Display or YouTube while keeping Search and Shopping. If Display is burning budget, your only option is placement exclusions (which are reactive, not preventive at the network level).
- Incomplete search term data. You will never see every query PMax matches against. A meaningful percentage of your spend goes to queries that never appear in any report.
- Signal suggestions, not signal enforcement. Audience signals guide but do not constrain PMax. Google will always explore beyond them.
- No dayparting granularity inside PMax. You cannot control when PMax spends on which network.
The management approach for these limits is structural: run PMax alongside standard campaigns that give you the control PMax lacks. Use standard Search for your highest-value keywords so PMax does not cannibalize them. Use standard Shopping if you need granular product-level bid control. Treat PMax as the campaign that captures incremental volume across surfaces you would not reach otherwise, and fence it with campaigns that protect your core terms.
Understanding why scaling budget alone does not scale revenue is directly relevant here. Pouring more money into an uncontrolled PMax campaign amplifies waste. Fixing the exclusion and structural layer first is what makes additional spend productive.
Common Mistakes To Avoid
Adding negatives once and never revisiting them. PMax continuously discovers new queries. A static exclusion list decays in value every week.
Blocking too aggressively. Over-exclusion can collapse PMax's reach to the point where it cannot find enough volume to optimize. Start with clear irrelevant terms and scale exclusions gradually while monitoring conversion volume.
Ignoring placement exclusions entirely. Most advertisers focus exclusively on negative keywords and forget that PMax runs on Display, YouTube, and apps. Placement exclusions often save more budget than keyword negatives.
Not separating brand traffic. Failing to apply brand exclusions means PMax claims credit for cheap branded conversions, inflating its reported ROAS and masking real performance on prospecting queries.
Using audience signals as a set-and-forget. Signals need the same audit cadence as negative keywords. Your ideal audience profile evolves, and your signals should evolve with it.
Relying on a single PMax campaign for everything. When one campaign covers all products, all audiences, and all goals, exclusions become blunt instruments. Segment into multiple PMax campaigns with dedicated asset groups so your exclusions can be more precise.
When To Let An Execution Engine Handle PMax Exclusion Management
Every step in this guide works. The problem is that it works if someone actually does it, every week, across every PMax campaign in the account. For agencies managing dozens of client accounts, this means hours of repetitive exclusion audits per week per client. For in-house teams, it means pulling your best media buyer off strategic work to chase irrelevant search terms in a report that does not even show them everything.
This is exactly the kind of operational execution that groas was built to handle. The groas engine, trained on over $500 billion in profitable ad spend, monitors PMax exclusion health around the clock. It catches wasted spend patterns faster than any human audit cadence because it is not waiting for a weekly calendar reminder. It is processing signals continuously.
For agencies using the DIY product, the groas engine handles the execution layer across every client account while your media buyers focus on strategy and client relationships. You keep your brand, your margin, and your clients. groas powers the PMax exclusion management (alongside everything else) underneath. Start your 7-day free trial to see it work across your client book.
For in-house teams that want to stay in control, the DWY product pairs the engine with a senior strategist who works alongside your team. You make the calls. The engine and strategist handle the grind of weekly exclusion audits, placement monitoring, and signal optimization. Your team stays in the driver's seat without spending half their week inside the Search Terms Insight report. Get started with a self-serve checkout for smaller accounts, or apply if you are managing larger spend.
For founders and executives who want PMax (and all of Google Ads) fully handled, the DFY product puts a dedicated strategist in charge of every decision, from exclusion lists to landing page optimization. Nothing to log into. Nothing to manage. Your strategist owns the entire exclusion workflow, the campaign structure, and every lever that affects performance. Apply to get access today.
Verdict
Controlling Performance Max spending requires a layered approach: negative keywords (via rep or self-serve), placement exclusions, brand exclusions, tightened audience signals, and a recurring audit cadence that keeps all of them current. The steps above give you every available lever in 2026. The constraint is not knowledge. It is execution capacity. PMax exclusion management is a weekly operational commitment that compounds when you skip it and compounds when you do it.
groas exists to make the execution question irrelevant. Whether you are an agency scaling across dozens of PMax accounts, an in-house team protecting your best campaigns, or a business that wants someone else to own this entirely, the groas engine runs this workflow around the clock while senior strategists make sure the strategic layer stays sharp. The gap between knowing what to do and actually doing it every single week is where most PMax budgets leak. Close the gap, and the numbers show up fast.
Frequently Asked Questions About Performance Max Negative Keywords And Exclusions
How Do You Add Negative Keywords To Performance Max Campaigns?
You can add negative keywords to Performance Max campaigns through two routes. First, check your campaign settings for a campaign-level negative keywords option under "Additional settings," which Google has been rolling out progressively. If it is available, add your negatives directly. If not, compile your negative keyword list and submit it to your Google Ads rep or through Google Ads support chat as an account-level negative keyword list. Build the list in your account's shared library first so you retain visibility and can migrate it easily when self-serve access expands to your account.
Why Does Performance Max Not Show All Search Terms?
Google aggregates and filters the Search Terms Insight report for Performance Max campaigns. Low-volume queries are omitted entirely, meaning a meaningful percentage of your ad spend goes to queries that never appear in any report. This is a platform-level limitation, not a settings issue. You cannot unlock full query-level data for PMax the way you can for standard Search campaigns. The practical response is to supplement the Insight report with placement exclusions, brand exclusions, and tightened audience signals to reduce wasted spend on queries you cannot see.
Can You Exclude Specific Networks Like Display Or YouTube From Performance Max?
No. Performance Max does not allow network-level opt-outs. You cannot tell PMax to run only on Search and Shopping while disabling Display, YouTube, Discover, or Gmail. If Display or YouTube placements are burning budget, your only recourse is to apply placement exclusions for specific sites, apps, channels, and app categories. This is reactive rather than preventive at the network level, which is why running standard campaigns alongside PMax for your most important traffic sources is a sound structural strategy.
How Often Should You Audit Performance Max Exclusion Lists?
Weekly for high-spend accounts and biweekly for smaller accounts. PMax's automation continuously explores new queries and placements, so an exclusion list that was complete last month will have gaps this month. Each audit should include pulling the Search Terms Insight report, reviewing the "Where ads showed" placement data, and verifying that brand exclusions cover all relevant terms. groas handles this operationally through a proprietary engine that monitors PMax exclusion health around the clock, catching wasted spend patterns faster than any manual audit cadence.
Do Audience Signals In Performance Max Actually Limit Who Sees Your Ads?
No. Audience signals in PMax are suggestions, not hard constraints. Google uses them as a starting point for optimization but will serve your ads to users outside your signal parameters whenever the algorithm decides it will improve performance. That said, campaigns with precise, high-intent audience signals consistently show lower wasted spend than campaigns with vague or missing signals. Treat signal optimization as a proactive exclusion strategy: tighter signals reduce the probability of irrelevant traffic before it happens.
What Is The Fastest Way To Stop PMax From Cannibalizing Brand Traffic?
Go to your PMax campaign settings and apply brand exclusions. Add your brand name plus all common misspellings, abbreviations, and variations. This forces PMax to stop bidding on branded queries and pushes that traffic to your dedicated branded Search campaign, where CPCs are lower and you have full control. After applying exclusions, monitor your branded Search campaign for two weeks to confirm impression volume returns. Include close variants in your exclusion list because Google's matching can be aggressive.
Is It Possible To Over-Exclude In Performance Max?
Yes. Over-exclusion can collapse PMax's reach to the point where it cannot find enough volume to run its optimization effectively. This leads to lower conversion volume, higher CPAs, and a campaign that underperforms compared to a moderately managed one. Start with clearly irrelevant terms and placements, then scale exclusions gradually while monitoring conversion volume, cost per conversion, and ROAS. If conversions drop sharply after adding a batch of negatives, review the list for terms that may have been too broad.
How Does groas Handle PMax Exclusion Management Differently Than A Traditional Agency?
A traditional agency assigns a media buyer who audits PMax exclusions during business hours, typically once a week, and is capped at whatever one person can physically review in that time. groas puts a proprietary engine trained on over $500 billion in profitable ad spend on the problem, running exclusion health checks continuously, not on a calendar. A senior strategist layers strategic judgment on top of the engine's output. The result is faster detection of wasted spend, broader coverage of the exclusion surface, and zero gaps caused by staff rotation, PTO, or simple human bandwidth limits.
Should You Run Standard Search Campaigns Alongside Performance Max?
Yes, for your highest-value keywords. Standard Search campaigns give you full control over keyword targeting, match types, bid adjustments, and negative keywords at a level PMax does not offer. Running standard Search campaigns for your core converting terms protects them from PMax cannibalization and gives you a performance baseline. PMax then captures incremental volume across surfaces like Display, YouTube, Discover, and Shopping that you would not reach with Search alone. This structural approach is more effective than trying to control PMax entirely through exclusions.
What Happens If You Never Add Negative Keywords To Performance Max?
PMax will continue to spend on every query, placement, and audience segment its automation considers relevant, including low-intent informational queries, irrelevant industries, mobile game app placements, and your own brand terms. Over time, this unchecked spending inflates your cost per acquisition, masks real prospecting performance behind cheap branded conversions, and reduces overall ROAS. The longer you wait to build exclusion lists, the more budget leaks. groas prevents this entirely by running continuous exclusion management as part of its core service, whether you choose the DIY, DWY, or DFY product.
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