Performance Max works in 2026 when it has two things: a clean product feed or strong creative assets, and enough accurate conversion data to learn from. It burns budget when it is fed weak lead-gen tracking, when nobody excludes your brand name, and when it is left to run unsupervised. For an e-commerce store with a healthy Merchant Center feed and steady sales, it is often the best campaign in the account. For a service business counting every form fill as a win, it is often the worst.
We run Performance Max, usually shortened to PMax, inside Google Ads accounts for Toronto retailers and service businesses every week, and we turn it off about as often as we turn it on. This guide covers how it actually works, when it earns its budget and when it does not, and the controls that separate a governed campaign from an expensive one.
What Performance Max actually is
Performance Max is a single Google Ads campaign that serves across Google's inventory: Search, Shopping, YouTube, Display, Discover, Gmail and Maps. You give it a goal, a budget, creative assets, optionally a product feed, and signals about your audience. Google's AI decides where, when and to whom each ad appears.
The trade is control for reach. A Search campaign lets you pick keywords, write ads per keyword and see exactly what you paid for. PMax gives you broader reach and automation, and asks you to steer it with inputs rather than direct settings. That is why the quality of the inputs, especially conversion tracking, decides almost everything about how it performs.
When Performance Max works
- E-commerce with a healthy feed. PMax was built around Shopping inventory. A Merchant Center feed with accurate titles, good images, correct prices, GTINs where they apply and no disapprovals gives it the raw material it needs. Feed quality is the campaign.
- Enough conversion volume. Our rule of thumb is at least 30 conversions a month per PMax campaign, ideally 50 or more. Below that, the algorithm has too little to learn from and performance swings week to week.
- Conversion values that reflect profit. When you pass real order values, or better, values adjusted for margin, PMax can bid toward revenue rather than volume.
- Good creative assets. Images, logos, headlines, descriptions and at least one real video. Without a video, Google may generate one from your images, and the result rarely represents a brand well.
- A budget that lets it learn. As a working minimum, the daily budget should cover a few conversions at your target cost per acquisition.
When Performance Max burns budget
Lead generation with weak tracking
This is the most common failure we inherit. A service business sets up PMax with "form submission" as the conversion. PMax finds the cheapest way to produce form submissions, which often means Display and app placements that generate spam or accidental leads. The dashboard shows a low cost per lead; the sales team says the leads are junk. Both are right.
The fix is tracking, not tweaking. Import qualified leads or closed jobs from your CRM as offline conversions, use enhanced conversions for leads, protect forms against spam, and set the account to optimise for the qualified-lead stage. If you cannot do that yet, run Search campaigns, where you control the queries, and come back to PMax later.
Brand cannibalisation
Left alone, PMax happily serves on searches for your own business name. Those people were already looking for you; they would likely have clicked your organic listing or a cheap brand Search ad. PMax claims the conversion and its reported return looks excellent, while the new customers it was meant to find are a smaller share of the results than the headline suggests.
California Shutters is a useful contrast. When we built their Google Ads program across 20+ locations, one of the deliberate choices was to forgo brand keyword bidding entirely and put spend toward local, non-brand demand. That decision was validated by real buyer data, and the California Shutters case study covers the structure. The principle applies to PMax: spend should go where it creates new demand, not where it collects demand you already own.
Thin accounts and small budgets
An account with a handful of conversions a month, a low budget and one asset group gives PMax nothing to work with. It will spend, and it will report something, but the learning never settles. Search, or Local Services Ads for trades, is usually the better starting point.
The controls that matter in 2026
PMax has gained meaningful controls since launch. A governed campaign uses all of them.
| Control | What it does | How we use it |
|---|---|---|
| Asset groups | Bundles of creative and signals for a theme | One per product category or service line, never one for everything |
| Audience signals | Suggestions of who to find first; not hard targeting | Customer lists, site visitors and custom segments built from search terms |
| Search themes | Tell Google which searches the asset group is relevant to | Fill gaps the landing pages do not make obvious |
| Brand exclusions | Stop PMax serving on brand searches on Search and Shopping | On by default in our builds, with brand covered by a separate Search campaign |
| Negative keywords | Block irrelevant queries at account or campaign level | Account-level list for jobs, free, DIY and competitor terms; campaign negatives as search terms appear |
| URL controls | Limit which pages Google can send traffic to | Exclude careers, blog and support pages when final URL expansion is on |
| Customer acquisition goal | Bid more for new customers, or only for new customers | For stores where repeat buyers already come back through email |
Asset groups
Asset groups are where most of the structure lives. Each one should match a coherent theme: a product category, a service line or a price tier, with creative and landing pages that speak to that theme. A single asset group containing every product forces one set of headlines to sell everything, and it blinds you to which part of the catalogue is working. For stores, custom labels in the feed (margin band, best sellers, seasonal) let you split products across campaigns or asset groups by how much you want to push them.
Search themes and audience signals
Both are hints, not hard limits. Search themes help when your site does not make your relevance obvious, for example a new service line with little content yet. Audience signals give the algorithm a starting point; PMax will move beyond them once it finds converting traffic. The strongest signal is almost always your own customer list.
Brand exclusions and negatives
Brand exclusions let you prevent PMax from serving on searches for your brand, using a brand list in the account. Run a separate brand Search campaign so you still own those results at a low cost and can see exactly what brand traffic costs. Account-level negative keywords apply across campaigns, PMax included, and are the right home for terms that are never relevant: jobs, careers, free, DIY, used. Campaign-level negatives in PMax let you go further once search term data shows waste.
Is your PMax campaign earning its budget?
We will show you how much of it is new demand and how much is your own brand.
Creative Scope is a Toronto Google Partner running Search, Shopping and Performance Max for retailers and service businesses. A free account review checks your tracking, brand exclusions, asset groups and search terms, and tells you whether PMax should stay, change or go.
See our Google Ads managementReading PMax reporting in 2026
For years, the biggest complaint about PMax was that it was a black box. That has improved. Google Ads now shows channel-level performance for PMax, so you can see how spend and conversions break down across Search, Shopping, YouTube, Display and the other surfaces, along with search term reporting and asset-level performance. The exact layout changes often, so look for these reports in the campaign view rather than relying on a screenshot from last year.
What to check every week:
- Channel mix. For lead generation, a large share of conversions from Display or other non-search placements is a warning sign until you have confirmed those leads are real.
- Search terms. Look for brand terms that slipped through, irrelevant queries to add as negatives, and converting themes worth their own Search ad group.
- Assets. Replace the weakest-performing images, videos and headlines every few weeks rather than rebuilding the asset group.
- New versus returning customers. If most PMax revenue comes from returning customers, the campaign is harvesting rather than growing.
- Blended results. Compare total revenue or qualified leads across the account before and after changes. PMax and Search both claim credit; the blended number is the one that pays the bills.
Accurate measurement underpins all of this. If your tags, consent setup or GA4 configuration are shaky, start with our GA4 cookieless setup guide.
PMax and Search together
PMax and Search campaigns can compete for the same queries. When a search matches a keyword in a Search campaign exactly, the Search campaign generally takes priority; otherwise ad rank and relevance decide. In practice, that means:
- Keep Search for the queries you most want to control: brand, your highest-value service terms, and anything where the landing page must match precisely.
- Let PMax cover the long tail and the other channels: Shopping, YouTube, Discover and searches you did not think to bid on.
- Move proven themes into Search. When PMax search terms reveal a converting theme, build a Search ad group for it with its own ads and landing page.
If you are deciding between Google and social channels altogether, start with our comparison of Google Ads vs Meta Ads.
Should you run Performance Max?
| Your situation | Our recommendation |
|---|---|
| E-commerce, clean feed, 30+ conversions a month | Run PMax, with brand exclusions and themed asset groups |
| E-commerce, feed problems or disapprovals | Fix the feed first; PMax cannot outperform its inputs |
| Lead generation with CRM conversion imports | Test PMax against Search with a controlled budget |
| Lead generation counting raw form fills | Search only until tracking measures qualified leads |
| Strong brand demand, weak non-brand results | Brand exclusions on, separate brand Search campaign |
| Small budget, few conversions | Search or Local Services Ads; revisit PMax later |
If you have inherited a PMax campaign and are not sure whether it is helping, our Google Ads audit checklist includes the PMax checks we run on every account, and our guide on choosing a Google Ads agency in Toronto covers the questions to ask anyone who wants to manage it for you. A good performance max agency should be able to tell you, in plain numbers, how much of your PMax revenue is new demand. If they cannot, that is your answer.
