Advertisers Swim in CTV Impression Pools at Their Own Risk

Dave Morgan
Dave Morgan  |  Chief Executive Officer
Published: Mar. 16, 2022

Recently, The Wall Street Journal reported that for the past nine months, Gannett’s USAToday.com delivered ad campaigns on websites where advertisers were not expecting them to run. Moreover, USAToday.com did not report this to advertisers transparently. Rather, it was only discovered after a researcher did some digging into ad campaign log files.

Unfortunately this happens all too often, particularly when digital publishers use impression pools to fill out the campaigns that they have sold and are delivering.

Impression pools are baskets of third-party inventory -- think long-tail ad networks -- added to campaigns to help fill out the delivery volume and bring down the overall campaign CPM, because they tend to be composed of very cheap inventory.

In impression pools, dodgy inventory is a main feature, not a bug. While it is not confirmed that it is what happened with USAToday.com, the story provides a context to resurface the issue of impression pools in advertising practice.

Do advertisers understand exactly when and how their digital campaigns are enhanced with third-party inventory? Most probably don’t -- and, as with so many similar issues in our industry, way too many advertisers don’t want to know.

It is particularly worrisome that impression pools are already becoming a standard part of the connected TV ad world.

It’s logical that this has happened. CTV is a premium-priced ad channel that is very hot, and in which there's both considerable advertiser demand and lots of premium inventory scarcity.

Rather than patiently wait to grow inventory the old-fashioned way by investing in content, marketing and promotion, some take the shortcut of buying cheap impressions off exchanges and repackaging them in their campaigns.

Given the understaffing at many agencies and advertisers today, the focus on lowering CPMs, and the heavily fragmented distribution and delivery channels into CTV inventory, the sector is not only ripe for abuse, it's also hard to have real transparency into where all a campaign’s CTV impressions are coming from.

Just say no to impression pools. Please.

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An earlier version of this blog was originally published by MediaPost.