If you run Performance Max, some of your budget is probably going to YouTube. That is not a fault in itself. The trouble starts when nobody on the account can say why, what the viewer saw, or whether it did anything. A Search Engine Land piece published on 29 September 2026 put this squarely on the table, and it is worth turning into an audit rather than a debate.
This guide covers how to audit Performance Max YouTube placements in a sensible order: where to look, what to check in your video assets and asset groups, which exclusions and brand-safety controls exist, how to judge YouTube’s real contribution, and when a separate Demand Gen or video campaign is the better tool. It sits alongside our guides on Google AI Max for Search and AI video ads.
What the Search Engine Land analysis actually said
Benjamin Wenner’s article, “Why Performance Max isn’t a YouTube ad strategy for ecommerce”, argues that many ecommerce brands are on YouTube without having made a decision to be there. Performance Max puts spend there by default, often with creative recycled from Shopping and Search, aimed at audiences the algorithm picks, and judged by attribution that flatters the result. You can read it on Search Engine Land.
The main points, in our words:
- YouTube is treated as cheap volume. The author says Performance Max optimises towards your conversion target and has little placement, sequencing or targeting strategy for video.
- Generated video fills the gap. He says that where advertisers supply no video, Google assembles one from feed images, stock transitions and text overlays. That is his description of the output, so check what your own account is serving.
- Search and YouTube behave differently. Search and Shopping capture demand that already exists. YouTube interrupts people, so it needs persuasive creative, a different measurement approach and more patience.
- Creative volume matters. He suggests brands doing well on YouTube test far more videos than the two or three many advertisers manage, and mentions 20 to 30 a month. Treat that as one practitioner’s view, not a benchmark.
- Do not judge it on last-click ROAS. His advice is to match the metric to the goal, and to consider media mix modelling once you have the data.
Two cautions. The article gives no independent performance figures, so it cannot tell you how much of your spend is at risk. And the argument that Google’s incentives favour filling YouTube inventory is the author’s interpretation, presented as opinion. We take the practical lesson and leave the motive question aside: you should know what your campaigns are buying.
Why this happens inside Performance Max
Google’s own help pages describe Performance Max as a goal-based campaign type that can reach all Google Ads inventory, including YouTube, Display, Search, Discover, Gmail and Maps. You give it assets, a conversion goal and a budget. It decides where each pound goes based on predicted return.
Google also says you cannot set a budget for each channel directly. A channel with little spend may simply be a lower priority at the moment, and a channel with plenty of spend may just be where the cheapest conversions (as the system sees them) are coming from. Neither is automatically good or bad. What matters is whether the pattern fits your business.
A few things tend to push spend towards YouTube:
- Video inventory is large and often cheap per impression. A system chasing volume under a target will use it.
- View-through and engaged-view credit. Conversions that follow a video impression can be counted, which can make the channel look productive. How much weight these carry depends on your conversion settings, so check them.
- Thin or missing video assets. If the asset group has no video, the campaign may use automatically generated video. Google’s help page describes auto-generated video as a campaign-level setting, so look for it in your campaign settings.
- Weak lower-funnel signals. If Search and Shopping inventory is limited by budget, targets or feed quality, spend can drift to wherever it can be delivered.
The point of an audit is not to remove YouTube. It is to turn an accident into a decision.
Step 1: Find out how much YouTube is getting
Start with the channel performance report. In Google Ads, go to Campaigns, open the Insights and reports menu and choose Channel performance. Google’s help page for the report says it covers Search, the Google Display Network, YouTube, Discover, Maps, Gmail and Search partners, and that you can download the data table.
What the report gives you:
- A performance summary. Actual against target ROAS or CPA, plus interactions, conversions, conversion value and cost.
- A channels-to-goals chart. Useful for filtering by channel, ad format and conversion type.
- A time series. This lets you line up channel shifts with changes you made, such as a new asset group or a target change.
- A distribution table with status labels. Statuses such as “Missing required assets” can point to a channel the campaign cannot fully use. Google notes that only some issues show up here.
Know the limits before you quote numbers to a client. Google lists several, including that dates before 6 June 2025 are not available in the date picker, that the product-data segment does not yet include video ads with products on YouTube and Discover, and that offline store conversions are combined into one total. One third-party write-up from December 2025 also said API and manager-account support were still coming; we have not confirmed that is still the case, so check your own account if you manage many.
Record three numbers per campaign: YouTube’s share of spend, its share of conversions and its share of conversion value. If the first is much larger than the others, you have your first finding.
Step 2: Audit video assets and asset groups
Once you know the scale, look at what is being shown. The creative is where most of the fixable problems sit.
Check the video assets
- List every video in every asset group. Note who made it, when, and what it is meant to do. One third-party 2026 round-up says the video limit per asset group rose from 5 to 15. We could not confirm that on Google’s own pages, so check the limit in your interface.
- Watch them with the sound off and on. A hook in the first few seconds, a clear problem, the product as the answer, a demonstration and a call to action is a reasonable structure. If your video is a slideshow of catalogue images, expect it to perform like one.
- Look for generated video. If you supplied none, find out whether auto-generated video is switched on in the campaign settings, and what it produced. Google’s help page warns that the products shown should match what is on your landing page, and suggests product filters on asset groups to keep them aligned.
- Check formats. Horizontal, vertical and square versions give the system something suitable for each placement. Missing formats are a common reason for poor-looking delivery.
Check the asset group structure
- One theme per group. A group that mixes bestsellers, clearance lines and a new launch gives the system no way to match creative to intent.
- Audience signals. These are suggestions, not limits. Review them, but do not expect them to keep YouTube spend in check.
- Product filters. For retail, separate groups for different margin bands or categories make later analysis far easier.
- Asset-level ratings and reports. Use them as a clue, not a verdict. A label tells you what the system prefers, not what makes you money.
The aim is one of two clear positions: either you supply video made for YouTube and accept that the channel is part of the plan, or you decide it is not, and use the controls below to reduce it.
Step 3: Review placements, exclusions and brand safety
Channel totals tell you how much. Placement data tells you where. Performance Max has placement reporting, and Google lists it as one of several reporting options alongside asset-level metrics and channel performance. Pull it, sort by spend, and look at what sits at the top.
What you can control
Google’s page on account-level placement exclusions sets out the rules we rely on:
- Performance Max exclusions live at account level. You manage them under Content suitability in the Tools menu, and they apply across the account.
- They cover YouTube too. You cannot exclude all of youtube.com at campaign level, but you can block specific channels or videos at account level, exclude content categories through content suitability settings, or leave out video assets to reduce YouTube serving.
- Manager accounts can share lists. Placement exclusion lists made in a manager account can be applied to linked accounts, which helps agencies with many clients.
- Limits apply. Google gives up to 65,000 exclusions per account, and says changes usually take effect within about 12 hours.
- Do not paste “www.”. Leaving it off covers subdomains and subpages on Display.
Brand suitability
Google’s brand suitability guidance for Performance Max describes three inventory types for YouTube, Display and video partners: Maximum, Moderate and Limited. Maximum is the default. Moderate and Limited exclude progressively more sensitive content, and Limited may reduce reach. You can also exclude content keywords, sensitive content categories and specific placements, and apply brand exclusion lists at campaign or account level.
For most brands, we would at least move off the default if the business sells to families, handles health or finance topics, or has a strict tone. That is a judgement call, not a rule, and it will trim reach. Test it rather than assume the cost.
What exclusions will not fix
Blocking a handful of poor placements will not turn Performance Max into a managed video campaign. If the real problem is creative or measurement, exclusions are plaster on a bigger issue.
Step 4: Measure what YouTube really contributes
This is where most accounts fall down. YouTube conversions inside Performance Max are reported under the same attribution rules as everything else, so the number you see is a claim, not a proof.
- Compare conversion types. Look at the share of conversions that are click-based against view-based. A channel living mostly on view credit needs more scrutiny than one with strong click-through conversions.
- Watch branded search. If YouTube is doing real work, branded search volume and direct traffic should move over time. Track them weekly against YouTube spend. A flat line is informative.
- Check new-customer share. If you use new-customer goals, see whether YouTube is bringing in new buyers or reaching people who already know you.
- Use assisted paths in GA4. The Search Engine Land author notes these still undercount, so treat them as one input.
- Run a controlled test where you can. Reduce YouTube exposure in one comparable campaign or region for a few weeks and compare blended results. It is imperfect, but it is better than reading a dashboard.
- Consider media mix modelling. For larger budgets, it is the least biased way to see channels side by side. The same author says it tends to show YouTube contributing less than Google reports but more than last-click suggests. See our guide to marketing mix modelling with Google Meridian.
Be careful with one trap he flags: stripping out view-through conversions and remarketing from Performance Max data can shrink YouTube’s apparent value to almost nothing. That tells you what YouTube does when measured one way, not what it is worth.
If your wider paid mix is under review, it is also worth seeing how other platforms handle automation. Our comparisons of ChatGPT ads and Google Ads and Meta’s Andromeda and Advantage+ show the same trade-off between control and convenience.
When to use Demand Gen or a YouTube campaign instead
If the audit says YouTube deserves a place in your plan, give it its own campaign. You get control over creative, audiences, placements and budget, and you get clean reporting.
- Use Demand Gen when you want visual, discovery-style reach. It suits product discovery, launches and retargeting across YouTube and other feeds, with creative you choose. We cover the Display side of that shift in our Demand Gen and Display migration guide.
- Use a dedicated YouTube or video campaign when video is the main job. That means awareness, consideration or a seasonal push, where you want to set the format, audience and frequency yourself.
- Keep Performance Max for the lower funnel. Shopping, Search and remarketing intent is what it handles best, and clean separation makes both campaigns easier to read.
Two sensible set-ups:
- Separate and exclude. Run a video or Demand Gen campaign for upper funnel, and reduce YouTube in Performance Max through the controls above, by avoiding video assets or using content exclusions. Be aware that you may not be able to remove it entirely.
- Keep it all, but intentionally. Supply proper video, set brand suitability, track branded search and accept a blended view of results.
Do not add YouTube to fix weak Shopping or Search results. As the Search Engine Land author puts it, extra traffic on a leaking funnel only speeds up the losses.
A short note for developers: Google Ads API v25.2 was announced on the Google Ads Developer Blog in September 2026. The Performance Max items in it are asset-group-level tracking templates, custom parameters and final URL suffixes, plus a method to create a Performance Max draft from a Smart campaign. Neither one gives you channel-level control over YouTube, so it does not change this audit. If you automate reporting, see our piece on automated audits for the general approach, and self-optimising marketing systems for where the guardrails belong.
Audit checklist, common mistakes and a 30-day plan
Step-by-step checklist
- Open Channel performance and record YouTube’s share of spend, conversions and value for each campaign over the last 30 and 90 days.
- Export the distribution table and note status labels that flag missing assets.
- Pull placement data and sort by spend. Mark anything off-brand, irrelevant or suspicious.
- List every video asset and check campaign settings for auto-generated video.
- Review asset group themes, product filters and formats.
- Check content suitability: inventory type, excluded categories, placements and brand lists.
- Split click-based and view-based conversions, and compare against branded search and new-customer trends.
- Decide for each campaign: keep YouTube, limit it, or move it to its own campaign.
Common mistakes
- Reading channel ROAS as proof. It is the platform’s own attribution.
- Excluding in the wrong place. Performance Max exclusions are account-level, so a campaign-level fix will not work.
- Leaving brand suitability on the default. Nobody chose it, so nobody owns it.
- Cutting YouTube without a test. You may remove assisted demand and not see it for weeks.
- Expecting per-channel budgets. Google says you cannot set them in Performance Max.
- Checking once. Placements and channel mix drift, so schedule the review.
Your 30-day action plan
- Week 1: run the channel and placement review, and screenshot the baseline.
- Week 2: fix the controls: brand suitability, account-level exclusions, asset group clean-up.
- Week 3: decide on video. Either brief proper YouTube creative or plan a separate Demand Gen or video campaign.
- Week 4: set up the measurement view (branded search, new customers, assisted paths) and agree a monthly review.
If you would like a second pair of eyes on this, our team can run the audit with you.
Frequently asked questions
Does Performance Max always spend on YouTube?
No. Performance Max can serve on YouTube, Display, Search, Discover, Gmail and Maps, and it allocates spend by predicted return. Some campaigns send a lot of budget to YouTube and others very little. Check the Channel performance report in your account to see the actual split, and compare it with conversions and value.
Where do I see YouTube spend in Performance Max?
In Google Ads, go to Campaigns, open the Insights and reports menu and choose Channel performance. It shows spend, conversions and value by channel, including YouTube, and you can download the table. Placement reports give more detail on where ads appeared. Check the limits Google lists, such as the earliest available date.
Can I stop Performance Max showing on YouTube?
Not fully at campaign level. Google says you cannot exclude all of youtube.com there. You can block specific YouTube channels or videos at account level, use content suitability settings, or leave out video assets to reduce YouTube serving. Results vary, so monitor channel reports after any change.
Are auto-generated videos a problem?
They can be if they misrepresent your brand or products. Google’s help page describes auto-generated video as a campaign-level setting and says products shown should match your landing page. Review what your campaign has produced. Supplying your own video made for YouTube gives you more control over the message.
How do I judge whether YouTube is helping my Performance Max results?
Do not rely on last-click ROAS or channel-level numbers alone. Compare click-based and view-based conversions, track branded search and new-customer share, check GA4 assisted paths, and run a controlled reduction test if you can. Larger advertisers can use media mix modelling for a fuller view.
When should I use Demand Gen instead of Performance Max?
Use Demand Gen, or a dedicated video campaign, when you want deliberate upper-funnel reach with your own creative, audiences and budget. Keep Performance Max for lower-funnel Shopping and Search intent. Separating them makes reporting clearer and lets you judge each campaign by the right measure.
Our PPC team will review your channel, placement and asset data and tell you plainly where your budget is going.
Riya Bhardwaj
Leading content and growth initiatives with a focus on search visibility, audience engagement, and measurable business outcomes. Specialised in SEO, Generative Engine Optimization (GEO), AI search optimisation, and performance-driven content marketing. Passionate about transforming market insights into scalable content strategies that strengthen brand authority and drive sustainable digital growth.