PMax brand exclusions: when and how to apply them

Biplab Poddar

12 hours ago

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Apply brand exclusions in Performance Max once you have dedicated branded Search coverage and clean prospecting data matters more than blended ROAS. The exclusion pulls your brand terms out of Search, Shopping, and YouTube search inventory (with an optional Shopping exception), and it will make your headline ROAS dip and CPA climb in the short term. That’s not underperformance. That’s the campaign finally showing you what your non-brand spend actually earns.

TL;DR:

Brand exclusions should only be used if you already have a dedicated branded Search campaign and sufficient non-brand demand to maintain optimization signals.

Applying exclusions will cause an initial drop in ROAS and rise in CPA, reflecting a more honest measurement of your non-brand performance rather than underperformance.

Ensure you build and monitor a regularly updated custom brand exclusion list, and test the impact on a small subset before applying it across your entire campaign portfolio.

Exclusions govern Search, Shopping, and YouTube search inventory, but Shopping ads can be kept active through the optional Shopping exception toggle.

Avoid early or broad exclusion application, especially for new campaigns or low-volume markets, to prevent starving the campaign’s learning phase and hampering long-term growth.

What do brand exclusions control in PMax?
When should you use brand exclusions?
How to create and apply a brand exclusion list
What happens after you apply the exclusion?
A practical checklist before you flip the switch
Oxedent view: running brand exclusions with agency discipline
Get your PMax brand exclusions set up properly
Sources

What do brand exclusions control in PMax?

A brand exclusion stops your ads appearing when someone searches your brand name, a common misspelling of it, or a related subsidiary brand. That’s a meaningfully wider net than a single negative keyword, which only blocks the exact term (or close variants) you type in. Google’s own brand exclusion guidance confirms the matching covers spelling variants and affiliated brands automatically, so you’re not manually chasing every typo your customers type into Google.

In Performance Max, exclusions govern three inventory types: Search, Shopping, and YouTube search results, according to Google’s own setup instructions. That’s the mechanism most people miss when they first apply a brand list. You’re not just blocking a search ad. You’re also pulling your product listings out of Shopping results for that same query, unless you tick the box that lets Shopping ads keep showing.

A few practical points worth flagging before you touch the settings:

Subsidiary matching isn’t perfect. Google’s pre-populated lists cover well-known brand families, but a newly acquired sub-brand may need a custom entry.
Exclusions don’t self-update. If a competitor starts bidding on your misspelt brand terms, or your own product range grows a new sub-brand, you’ll need to revisit the list.
They interact with brand inclusions. If a campaign runs both, exclusions take priority over inclusions, so a badly scoped exclusion list can silently override a targeting decision you made elsewhere.

None of this is set-and-forget. Treat the brand list as a living asset, not a one-time checkbox.

When should you use brand exclusions?

Two conditions need to be true before you flip this switch. First, you need a dedicated branded Search campaign already capturing that demand efficiently, so excluding brand terms from PMax doesn’t just mean losing those conversions outright. Second, your non-brand volume needs to be big enough that the resulting data still tells you something useful. A store doing a handful of non-brand conversions a week won’t learn much from segmenting further.

Here’s a practical decision sequence to run through before applying anything:

Check branded Search coverage. If you don’t have a standalone branded campaign already picking up high-intent brand searches, exclude from PMax first and you’ll simply lose that revenue rather than reallocate it.
Confirm non-brand volume is sufficient. PMax needs enough signal to keep optimising; a brand-heavy account with thin non-brand demand risks starving the algorithm, a concern Google flags directly in its brand suitability guidance.
Decide your Shopping exception setting. Many retailers keep Shopping ads visible on excluded brand searches so product listings still appear, even while the Search and YouTube inventory is blocked.
Set a measurement baseline. Record current blended ROAS and CPA before you apply anything, so the post-exclusion comparison is honest rather than guessed.

New accounts, low-volume markets, and campaigns still inside their initial learning phase are the wrong moment to apply exclusions. PMax leans on branded conversions early on to establish patterns; strip them out too soon and you risk a slower, noisier ramp rather than a cleaner one.

Pro Tip: Don’t judge the exclusion by week one. ROAS typically dips and CPA typically rises the moment brand conversions disappear from the mix, purely because you’ve removed your cheapest, highest-converting traffic from the blend. That’s the data becoming honest, not the account breaking.

How to create and apply a brand exclusion list

Google Ads gives you two starting points for building a brand list: a pre-populated selection of recognised brands, or a custom list you build yourself for your own brand and any subsidiaries. Both live in the same settings panel, and the process for applying either one to a live campaign is straightforward once you know where to look.

Building the list:

In Google Ads, navigate to the campaign’s settings and find the brand exclusions (or brand suitability) panel, sometimes surfaced alongside AI Max controls on newer account layouts.
Search Google’s pre-populated brand database for your own name and any known competitors you want to exclude, or select “create custom list” if your brand doesn’t appear.
Add your brand name, obvious misspellings, and any subsidiary or sub-brand names to the custom list manually.
Name the list clearly, something like “Brand_Exclusions_MainSite_2026” rather than a generic default, so anyone auditing the account later understands its scope at a glance.
Save the list before attaching it to a campaign; it needs to exist as a standalone asset first.

Applying it to campaigns:

For a new Performance Max campaign, apply the brand list during the campaign build, in the same settings section where you configure budgets and goals.
For an existing campaign, open its settings, locate brand exclusions, and attach the saved list without needing to rebuild the campaign from scratch.
Tick the checkbox allowing Shopping ads to continue serving on excluded brand searches, if you want product listings to remain visible while blocking Search and YouTube inventory, a control Google documents directly.

A few things worth knowing before you commit:

Exclusions can be applied at campaign level or account level, and Google’s Shared Library tools support bulk edits if you’re managing several campaigns with the same brand rules.
If you manage brand exclusions across a portfolio of accounts, build the list once and copy it, rather than recreating it from memory each time.
Review the list quarterly at minimum. Brands change, competitors’ bidding behaviour changes, and a stale exclusion list either lets brand traffic leak back in or blocks terms you no longer need blocked.

Our guide on Performance Max strategy for ecommerce managers covers how this setup work fits into a broader campaign structure decision.

What happens after you apply the exclusion?

Expect ROAS to fall and CPA to rise in the days immediately following exclusion, and treat that as expected behaviour rather than a fault. Removing branded conversions, historically your cheapest and highest-converting traffic, from the blended metric will always make the remaining numbers look worse on paper, even though nothing about your prospecting performance has changed. Practitioners tracking this shift describe it as the account becoming honest about its true incremental performance rather than resting on inflated brand demand.

The bigger operational risk is applying exclusions too aggressively and starving PMax of the signal it needs to keep learning. Google’s own guidance on brand suitability features warns that restrictive settings applied too early, or without adequate branded Search coverage, can genuinely limit how well the campaign performs. Stage your rollout instead of flipping the switch on every campaign at once.

A recommended cadence is to apply the exclusion to a limited number of campaigns first and carefully monitor key performance metrics over the following weeks.

Non-brand conversion rate, to confirm prospecting traffic is converting at a stable or improving rate once brand noise is removed.
Search insights reports, to spot whether excluded brand terms are still generating impressions elsewhere in your account.
Shopping performance, if you’ve kept the Shopping exception enabled, since that inventory continues operating under different rules to Search.

A short-term ROAS drop paired with a rising CPA is the expected signature of a correctly applied exclusion, not a sign to reverse it immediately. Pair the brand list with existing negative keywords and any account-level exclusions you already run, so the settings reinforce each other rather than working in isolation. Our piece on search exclusions in Google Ads breaks down how the two mechanisms complement one another in more detail.

A practical checklist before you flip the switch

Run a brief audit first: assess the proportion of your current PMax conversions that are branded, and confirm you have a standalone branded Search campaign effectively capturing that demand before applying exclusions.

Test on a subset first. Apply the exclusion to one campaign, not your whole account, and run it for a short observation period before drawing conclusions.
Set rollback triggers in advance. Agree a non-brand conversion volume threshold that, if breached, triggers reverting the exclusion rather than waiting to see if things recover.
Name and version the list clearly. Include the date and scope in the list name so anyone auditing the account later understands exactly what changed and when.
Restrict who can edit brand lists. A single owner (or a small, named group) prevents accidental changes mid-test.
Document the decision. Record the baseline metrics, the test window, and the outcome for client reporting or internal audit trails.

Pro Tip: Keep a simple change log alongside the account, just a date, the list version, and the metric baseline. When a client asks six months later why ROAS shifted in March, you’ll have the answer in one line instead of reconstructing it from memory.

For more governance ideas that pair well with this checklist, see nine Performance Max practices that scale.

Oxedent view: running brand exclusions with agency discipline

Every account Oxedent takes on gets audited for branded share before we touch a single setting. If branded conversions are propping up the headline numbers, we say so, and we build the branded Search campaign first rather than excluding blind. Staged rollouts, the Shopping-ads exception kept switched on by default for retail clients, and a documented rollback threshold are standard, not optional extras.

What we don’t do is promise a ROAS increase from exclusions alone. They reveal your real incremental performance; they don’t manufacture profit… Clean data is the goal. Everything else follows from getting that right first.

— Biplab

Get your PMax brand exclusions set up properly

Getting brand exclusions right takes more than ticking a settings box. It means auditing branded share accurately, sequencing the branded Search campaign correctly, and knowing which metric moves are healthy versus which ones signal you’ve gone too far, too fast. Oxedent runs this process for established ecommerce brands with meaningful monthly ad spend, building the governance and monitoring cadence around your account rather than a generic template.

If you’re managing a Performance Max account and unsure whether your branded traffic is masking weak non-brand performance, our eCommerce PPC management service covers exactly this kind of audit and implementation work, alongside the wider account structure decisions that determine whether PMax earns its budget. Get in touch and we’ll tell you honestly whether an exclusion makes sense for your account yet, or whether you need the branded Search foundation in place first.

Sources

For the exact mechanics covered here, Google’s own pages remain the most reliable reference: applying brand exclusions to Performance Max, how brand matching works, and brand suitability features. For the strategic trade-offs, see Search Engine Land’s practitioner discussion and comparative guidance on Google Ads vs Facebook Ads prioritisation.