Google shipped a Demand Gen change that most media buyers are going to see in the reporting first and figure out later. If image assets have been quietly earning view-through credit in a Demand Gen campaign, that credit is about to move desks — and the bidder will stop caring about it.
Per Search Engine Land's coverage of the mid-August update, three things are changing at once: VTC optimization is going video-only for Demand Gen, VTC inventory is expanding beyond YouTube and Discover into Display, and video assets served on Display will bill on CPM instead of CPC regardless of whether VTC is switched on.
What VTC video-only actually means
View-through conversions have always been the "give me credit even when they didn't click" lever for Demand Gen. Someone sees the ad, doesn't click, converts within the window, and Smart Bidding factors that signal into how it pays for the next impression.
Under the new rule, that signal is measured against video assets only. Image asset view-throughs will still be reported — but as a secondary conversion, not in the primary Conversions column. And the bidder won't optimize toward them. Search Engine Land is explicit that image asset VTCs will no longer be eligible for bidding and will drop out of the primary column in existing VTC-enabled campaigns.
For brands where Demand Gen has been pulling in a meaningful share of assisted conversions from static image inventory, the reported number in the column your team looks at every morning is going to shrink. That's not the campaign performing worse. It's a reporting definition change.
The Display expansion is the bigger structural shift
The second half of the announcement is easier to miss. Google is opening VTC inventory to Display placements, where before it lived on YouTube and the Discover Feed only.
For new Demand Gen campaigns, VTC optimization is on by default. Existing campaigns keep their current setting unless you opt in. So Display inventory is now inside Demand Gen's reachable universe for anyone who spins up a fresh campaign this week and doesn't uncheck anything.
The catch is the billing change. Video assets served on Display will bill on CPM, not CPC. And that switch happens regardless of whether you've enabled VTC — the placement itself changes how you pay. If you were mentally budgeting a Demand Gen campaign as a click-cost line item, video-on-Display just quietly broke that model.
Where this hits existing accounts
There are three specific accounts most exposed to this.
Static-heavy Demand Gen advertisers who leaned on image assets because they had them ready — CPG, mid-market DTC, anyone who built the campaign around a catalog of product photos rather than a video production pipeline. The VTC data in their primary reporting column is going to look like a decline that isn't one, and the bidder is going to stop optimizing for the audience segments those image assets were reaching through view-through paths.
Advertisers with Discover-only Demand Gen who deliberately avoided Display placements. New campaigns are the risk here — they will include Display inventory unless you configure them not to, and the billing model for the video creative on those placements shifts to CPM without a checkbox.
Anyone modelling ROAS by attribution window. Moving image asset VTCs to a secondary column changes what shows up in your last-click column, and by extension the ROAS number that lands in the weekly report. Nothing is different about actual sales — but if your dashboard pulls from the primary Conversions column, expect the ratio to move.
What to check this week
Pull a 30-day view of your Demand Gen campaigns and break out conversions by asset type before the change fully rolls in. That's your baseline for what image asset VTC was actually contributing.
Check whether any of your live Demand Gen campaigns have VTC enabled and rely on image assets for a meaningful share of impressions. Those are the campaigns where the reported conversion number will drop after the update, and where the bidder will start ignoring signals it used to weight.
For any new Demand Gen campaign, decide whether Display inventory is something you want, and whether the CPM billing model works for the video creative you're going to serve there. The default is opt-in for VTC on new campaigns — silence means yes.
Talk to whoever owns your creative pipeline about video coverage. Google is not the only platform pushing this direction — Meta's Andromeda and TikTok's Symphony both treat video as the primary creative surface. The Demand Gen change is another step in the same direction: static image inventory is being pushed into secondary status across the ad ecosystem.
The bottom line
This is a mechanical change, but the reporting effects will be immediate for accounts where image assets were doing quiet work in the VTC column. Nothing about actual campaign performance changes on day one — but your dashboards, your ROAS ratios, and Smart Bidding's signal set all do.
If you're not sure whether Demand Gen VTC is where a chunk of your assisted conversions have been coming from, a free audit at /audit can pull that out of your account structure in a few minutes.
The advertisers who read the update carefully in August will be the ones whose Q4 reporting doesn't surprise anyone in October.
Sources: Search Engine Land, ppc.land, August 2026
