Yes, negative keywords work in Performance Max — but the mechanism differs from Search campaigns. There is no keyword tab; negatives are applied via shared account-level lists or, for most accounts, a campaign-level tab now available in the UI and in Google Ads Editor 2.5+. Placement exclusions are a separate, equally important layer that keyword negatives alone do not cover.
Key takeaways
PMax honors negative keywords at two levels: account-level shared lists and campaign-level negatives (now in the UI for most accounts and in Editor 2.5+ for all).
Keyword negatives control Search and Shopping query matching; placement exclusions control Display, YouTube, Gmail, and app inventory — you need both.
A brand Search campaign does not fully protect branded queries from PMax; a dedicated brand negative keyword list applied to the PMax campaign is required.
The PMax search terms report shows only "significant" queries — negative keyword hygiene must be proactive, not purely reactive.
Over-constraining PMax with broad match negatives undermines its machine learning; default to exact match negatives unless you have a specific reason to go broader.
Key terms
Performance Max (PMax)
A Google Ads campaign type that serves ads across all Google channels — Search, Shopping, Display, YouTube, Gmail, Discover, and Maps — from a single campaign using automated bidding and asset groups.
Negative keyword
A keyword that prevents your ad from being triggered by a search query containing that word or phrase, stopping irrelevant traffic from matching your campaign.
Placement exclusion
A setting that blocks your ads from appearing on specific websites, YouTube channels, apps, or app categories, independent of keyword matching.
Account-level negative keyword list
A shared list of negative keywords stored in the Google Ads Shared Library that can be applied to multiple campaigns simultaneously, affecting all campaigns it is attached to.
Search terms report
A report in Google Ads showing the actual queries users typed that triggered your ads, used to identify irrelevant traffic and inform negative keyword decisions.
---
How do negative keywords actually work inside a Performance Max campaign?
Performance Max honors negative keywords, but applies them differently from Search campaigns: there is no keyword tab, and the match logic operates across a multi-channel inventory that keyword exclusions alone do not fully cover. [1] Negatives prevent specific query patterns from triggering ads on Search and Shopping placements, while a separate placement exclusion system handles Display, YouTube, Gmail, Discover, and app inventory. [2]
The three layers of PMax exclusions
Account-level negative keyword lists — Created under Tools & Settings > Shared Library > Negative Keyword Lists and attached to one or more PMax campaigns. Best for broad exclusions that apply account-wide (e.g., job-seeker terms in a B2B account).
Campaign-level negative keywords — Available as a dedicated tab inside the PMax campaign UI for most accounts as of 2024, and surfaced in Google Ads Editor 2.5+ even when the UI has not rolled out. This is the preferred method for campaign-specific exclusions.
Placement exclusion lists — Applied via Tools & Settings > Shared Library > Placement Exclusion Lists. Controls which URLs, YouTube channels, apps, and app categories can serve your ads.
Key Insight: Keyword negatives and placement exclusions are independent systems. Setting keyword negatives does not stop your PMax budget from appearing on irrelevant apps or YouTube channels — you must configure both layers separately.
---
What match types should you use for PMax negative keywords?
Exact match is the safest default for PMax negative keywords because the limited search terms visibility makes it very difficult to diagnose over-exclusion caused by phrase or broad match negatives. [3] Broad match negatives in particular carry a high risk of suppressing legitimate queries across multiple campaigns simultaneously when applied via a shared account-level list.
Match Type
Works in PMax?
Recommended Level
Key Risk
Exact match negative
✅ Yes
Campaign-level or account list
Low — most surgical option
Phrase match negative
✅ Yes
Campaign-level or account list
Medium — test before scaling
Broad match negative
✅ Yes
Account list only (use sparingly)
High — can suppress legitimate queries at scale
Common Mistake: Adding negatives in broad match to an account-level list without auditing scope first. A term like "free" added as a broad match negative at the account level can instantly suppress legitimate queries across dozens of campaigns. Always start with exact match negatives in PMax.
---
Why do branded queries still appear in PMax even when a brand Search campaign exists?
Google's stated priority rule — that an active keyword in a standard Search campaign takes precedence over PMax for matching queries — does not eliminate branded leakage in practice because several edge cases route branded traffic to PMax regardless. This is one of the most discussed pain points in the r/PPC community thread on this topic, and understanding why it happens is essential before building your exclusion setup.
Why brand leakage still occurs
Misspellings and close variants — If your brand Search campaign uses exact or phrase match, close variants not explicitly covered may route to PMax.
Shopping inventory — Branded product searches can surface via PMax's Shopping placements even when a brand Search campaign is active, because keyword match priority applies differently to Shopping. [4]
Low-volume branded terms — Queries with very low historical volume may lack enough signal for Google to consistently prefer the brand campaign.
Asset group relevance — If your brand name appears in PMax headlines or descriptions, the system treats those asset groups as highly relevant to branded queries and may pursue them aggressively.
The correct brand exclusion setup
Create a dedicated negative keyword list named something like "Brand Exclusions — PMax" containing your brand name, common misspellings, and branded product names — all in exact match to start.
Apply the list at the campaign level inside the PMax campaign if the tab is available in your UI.
If the campaign-level tab is not yet visible in your UI, apply the list via Google Ads Editor: select the PMax campaign > Keywords & Targeting > Negative Keywords.
For accounts spending above $50K/month, your Google rep may be able to apply backend brand exclusions that the self-serve UI does not yet expose — worth requesting.
Validate weekly using the PMax search terms report, filtered for your brand name.
Best Practice: Build a tiered brand negative structure. Start with exact match negatives for core brand terms, monitor the search terms report weekly for 30 days, and only expand to phrase match if branded variants consistently break through. Test phrase match negatives in a small isolated list before applying them account-wide.
If you are weighing whether to run PMax alongside branded Search at all, the Performance Max vs. Search comparison covers that structural decision in detail.
---
How do you use the PMax search terms report to validate negative keywords?
The PMax search terms report provides a partial view of queries — enough to identify patterns and confirm exclusions are holding, but not a complete picture of every matched query. [5] Navigate to your PMax campaign > Insights & Reports > Search Terms to access it.
What to look for
Brand terms appearing despite exclusions — If your brand name appears here, check that the negative is in the correct match type and that the list is actually applied to this specific campaign, not a different one.
Irrelevant category bleed — Common in accounts with broad product catalogs; use these terms to build category-level negative lists.
Competitor brand terms — Determine consciously whether you want to exclude or keep these rather than letting PMax decide by default.
High-impression, zero-conversion patterns — These are the clearest signals for new exact match negatives.
Key Insight: The PMax search terms report only surfaces queries Google deems "significant" — typically those with at least a handful of impressions in the selected date range. You will never see 100% of matched queries. Negative keyword strategy in PMax must be proactive (pre-emptive exclusion lists) rather than purely reactive. [5]
How do placement exclusions work in Performance Max, and why do they matter?
Placement exclusions block your PMax ads from appearing on specific URLs, YouTube channels, mobile apps, or app categories — none of which keyword negatives can control. [1] For e-commerce and lead generation accounts, failing to set placement exclusions while running PMax at significant spend is consistently one of the largest sources of wasted budget in accounts I audit.
Setting up placement exclusions
Go to Tools & Settings > Shared Library > Placement Exclusion Lists.
Create a list with specific URLs, YouTube channels, apps, or app categories to exclude.
Apply the list to your PMax campaign at the campaign level.
For e-commerce accounts, excluding mobile app categories such as Games and Entertainment is a practical starting point — these categories tend to generate high click volume with very low conversion rates. In accounts I manage, systematic placement exclusions applied at launch have produced meaningful ROAS improvements within 30 days.
Best Practice: Build a "starter exclusion list" for every new PMax campaign covering mobile app general category exclusions, YouTube channels irrelevant to your product vertical, and known parked domain patterns. Apply it on day one before the campaign accumulates spend — budget wasted during the learning phase is not recovered.
Common Mistake: Assuming keyword negatives protect you from irrelevant Display and YouTube inventory. They do not. Running PMax above $10K/month without placement exclusions almost always leaves significant efficiency gains uncaptured.
---
How should negative keyword strategy differ by account type?
The right negative keyword approach in PMax depends on your business model — e-commerce, B2B lead generation, and local service businesses each have distinct exclusion priorities.
E-commerce with multiple product categories
If you run separate PMax campaigns per category (e.g., furniture vs. home decor), add the competing category's core keywords as negatives in each campaign to prevent internal cannibalization and give the system cleaner optimization signals. For more on structuring these campaigns, see all Shopping & PMax answers.
B2B lead generation
B2B accounts using PMax for lead gen need aggressive negative keyword lists to protect lead quality. Common exclusions include:
DIY or consumer intent terms your product does not serve
Geographic terms for regions outside your service area
Competitor brand names (unless conquest is part of your strategy)
Local service businesses
Geographic bleed — PMax showing for service areas you do not cover — is common even when geo targeting is set correctly. Adding city and region names you do not serve as exact match negatives is a practical workaround while geographic targeting catches up.
If you are still evaluating whether PMax is the right campaign type for your situation, this breakdown of when PMax makes sense covers the structural trade-offs.
---
What to do next
Audit your current negative coverage. Go to Tools & Settings > Shared Library and confirm which negative keyword lists exist and which PMax campaigns they are applied to. If none exist, that is your first action.
Build and apply a brand negative list immediately. Add your brand name, top branded product names, and common misspellings in exact match. Apply at the campaign level if the UI tab is available; otherwise use the account-level shared list and Google Ads Editor.
Create a starter placement exclusion list. At minimum, exclude mobile app categories irrelevant to your offer and apply the list to every active PMax campaign before the next billing cycle.
Set a weekly search terms review cadence. Filter the PMax search terms report for branded terms, irrelevant categories, and high-impression/zero-conversion patterns. Add exact match negatives for clear mismatches.
Document every exclusion decision. Maintain a spreadsheet log of what you excluded, why, and when. PMax's limited visibility makes this the only audit trail available when onboarding new team members or inheriting accounts. You can also run a 250-point Google Ads audit to surface exclusion gaps systematically.
---
Frequently asked questions
Can I add negative keywords to PMax directly in the Google Ads interface?
Yes, for most accounts. Google rolled out campaign-level negative keyword tabs inside the PMax campaign UI through 2023–2024. If you do not see the tab yet, you can add campaign-level negatives via Google Ads Editor 2.5+. Account-level shared lists applied to the campaign have also always been available.
Will adding too many negative keywords hurt PMax performance?
Yes. Over-constraining PMax with excessive or overly broad negatives limits the data the system needs to optimize, which can stall learning and reduce conversion volume. The goal is to remove clear waste and protect other campaigns — not to replicate the surgical keyword control you use in Search campaigns. Start narrow with exact match negatives and expand only on evidence.
Do negative keywords in PMax affect Shopping placements as well as Search?
Yes. Keyword negatives in PMax suppress matching queries across both Search and Shopping placements. However, Shopping inventory has some nuances — branded product queries in particular can surface through Shopping even when a brand Search campaign is active, because keyword match priority logic applies differently in that channel.
How is PMax different from Smart Shopping when it comes to negatives?
Smart Shopping campaigns were upgraded to Performance Max in 2022 and no longer exist as a separate campaign type. PMax offers significantly more control than Smart Shopping did: campaign-level negative keywords, placement exclusions, and asset group structures were not available in Smart Shopping. If you are still reading guidance written for Smart Shopping, it is outdated.
Can I see which queries my PMax negative keywords are blocking?
No. Google does not provide a report showing suppressed queries — only the search terms report showing queries that did serve. This makes it important to add negatives carefully (starting with exact match) and to monitor the search terms report weekly to confirm branded or irrelevant terms are no longer appearing rather than assuming your exclusions are holding.
Should I use the same negative keyword list for PMax and my Search campaigns?
Generally no. PMax and Search campaigns have different optimization behaviors and different exposure risks. Using a single shared list creates a situation where a negative added for PMax reasons suppresses Search campaigns, and vice versa. Maintain separate lists — one for account-wide exclusions that genuinely apply everywhere, and campaign-specific lists for everything else.
AI Disclosure: This article was generated with AI assistance based on a community discussion on Reddit r/PPC. Expert analysis and practitioner perspective by John Williams, Founder, AHMEEGO · Google Ads Practitioner with $350M+ in managed Google Ads spend. AI was used to draft and structure the content; all strategic recommendations reflect real campaign experience.
