If you have already invested in curating where your video ads run, it is reasonable to assume display is covered by the same thinking. It usually is not — and the reason is structural rather than a gap in anyone's product.
Video curation and display curation solve different problems, on different inventory, with different controls. Understanding why is the difference between an exclusion strategy that works and one that quietly does nothing.
What video-first platforms cover
The established platforms in this space are explicit about their scope. Channel Factory, one of the better-known, describes itself as providing brand safety and contextual video advertising, and states its coverage plainly on its own site: "Master YouTube, expand seamlessly to Meta, TikTok, and CTV." Its products — View IQ for content curation, Activate IQ for media optimisation — are built around video-level analysis.
That is a coherent and well-defined product. This is not a criticism of it. Google Display Network banner inventory simply is not what it claims to cover, and there is no reason it should be. The two are different problems.
The same is broadly true across the category: verification and curation vendors grew up around video and programmatic buying, because that is where the money and the scandals were.
Why display is a different problem
The inventory has a different shape
YouTube inventory is effectively unbounded. Hundreds of hours are uploaded every minute, across a channel count that grows faster than anyone can review. You can exclude a thousand channels and still be running on inventory that did not exist yesterday.
Display inventory is large but finite, and it repeats. The same domains show up in placement report after placement report. That difference changes the correct strategy completely:
- On YouTube, category and suitability controls do the heavy lifting, because manual curation cannot keep up with an infinite catalogue.
- On display, manual and automated curation of domains actually works, because the work compounds. A domain you exclude today stays excluded, and it was probably going to appear again next month.
This is covered in more depth in the guide to YouTube exclusion lists.
The identifiers are incompatible
A YouTube exclusion needs a channel ID — the UC… string, not the handle and not the URL. A display exclusion needs a domain.
These do not substitute for each other. Adding youtube.com to a placement exclusion list excludes nothing, and a list of domains exported from a display placement report provides no YouTube coverage whatsoever. Advertisers regularly believe one list covers both. It does not.
Made-for-advertising sites are a display-native problem
This is the substantive difference.
Made-for-advertising sites exist to generate ad revenue rather than to serve readers: thin or scraped content, extreme ad density, traffic bought rather than earned. They are a website business model. The whole economic structure — buy cheap traffic, wrap it in ad slots, arbitrage the difference — depends on being a webpage with banner inventory on it.
YouTube has low-quality content, but it does not have this. Monetisation runs through a single platform with its own rules, so the arbitrage model that produces MFA sites does not translate.
Which means the dominant failure mode in display has no equivalent in video, and tooling built for video has no particular reason to detect it.
The controls sit in different places
For YouTube, the meaningful levers are inventory mode and content-category exclusions, applied at account or campaign level, plus channel exclusions for specific offenders your reports surface.
For Display and PMAX, the lever is the placement exclusion list. Since Google's January 2026 rollout, one list applied once at the account level covers every Display and PMAX campaign automatically, including campaigns created later. The complete guide covers the mechanics.
PMAX sharpens this. It gives you very little placement control inside the campaign, so an account-level exclusion list is close to the only lever you have — and PMAX serves across both display and video, which means neither a video-only nor a display-only approach covers it on its own.
What this means in practice
If you already curate video inventory, you have done real work, and none of it is wasted. But you should assume your display placements are unaudited until you have actually looked.
The check takes about ten minutes:
- Pull Reports → Predefined reports → Other → Campaign URL performance in Google Ads, over the last 90 days.
- Sort by cost and read the domain names. If most of them are unfamiliar, that is the finding.
- Look at what sits below the top 50. In a real 5,183-placement account we analysed, 62% of placements had cost nothing at all while consuming impressions, and 36.8% of spend went to placements with zero conversions.
- Check whether your existing exclusion list contains any domains at all, or only YouTube channel IDs.
You can run steps 2 and 3 automatically with the free placement exclusion list generator — it reads the report in your browser, nothing is uploaded, and it gives you a spend breakdown plus a ready-to-paste exclusion list. The signal ruleset it uses is published openly if you want to check the reasoning rather than take it on trust.
The short version
Curating YouTube well tells you nothing about your display placements, because they are different inventory with different identifiers, different failure modes and different controls. Video-first platforms cover video, and say so. Display needs its own audit.
If you want the domains in your placement report actually visited and scored — for MFA patterns, ad density, category and brand safety, rather than judged on how the name looks — that is what we do.