Connected TV (CTV) is becoming an increasingly important part of marketing and media plans, combining the storytelling power of the big screen with the targeting, efficiency and measurement capabilities of programmatic advertising. However, evaluating CTV using mobile user acquisition (UA) benchmarks can overlook the unique role it plays in the conversion journey.
For years, mobile UA has been built around a familiar equation: serve an ad, drive a click, generate an install and measure the resulting cost per acquisition. CTV, however, operates differently. While it can influence consumer behavior and drive downstream actions, those actions often occur on another device rather than on the screen where the ad was viewed.
This distinction matters when measuring CTV user acquisition. Applying the same metrics and attribution logic used for mobile may not fully capture the way consumers engage and convert on the TV screen.
Mobile UA has traditionally been built around a fairly direct chain: impression → click → install → conversion.
CTV requires a different chain: exposure → consideration → cross-screen action → conversion.
On a TV screen, the interaction may not happen on the device where the ad was served. A viewer may see an ad for a gaming app on CTV, consider it, and later install the app directly from their phone. There is no click on the television to connect the two events, but the CTV exposure can still be linked to the subsequent mobile action.
This is why CTV measurement needs to account for the cross-screen nature of the journey. Rather than looking for a direct click-to-conversion path, marketers need to understand how exposure on one screen can influence an action on another—and measure that relationship accordingly.
But connecting the journey is only the first step. Once multiple touchpoints contribute to a conversion, the next question is how credit should be assigned across them.
That is where attribution becomes important.
CTV attribution helps connect an eligible CTV ad exposure with a subsequent app action on another device, such as a mobile install or in-app event, based on a defined attribution methodology and attribution window.
This is particularly relevant because the CTV journey does not always include a direct click. A consumer may see an ad on television, later search for the brand or app on their phone, and then install or take another measurable action. The conversion happens on mobile, while the CTV exposure may have occurred earlier on a different screen.
The attribution model determines how that downstream action is credited. A last-click approach primarily assigns credit to the final measurable click, while view-through and cross-screen attribution methodologies can assess whether an eligible conversion occurred following a qualifying CTV exposure, subject to the methodology, lookback window and other attribution rules.
But attribution answers a specific question: which conversions can be associated with the CTV campaign under the chosen model? It does not establish whether those conversions would have happened without the CTV exposure.
That is a different question—and one that matters when evaluating CTV as a performance channel.
Ultimately, the question for CTV should not be whether it can replicate mobile's click-to-install mechanics. It is whether CTV can drive additional conversions beyond those that would have occurred without the CTV exposure.
This is where incrementality becomes particularly valuable. By comparing exposed and appropriately constructed control audiences, advertisers can assess whether CTV exposure resulted in additional installs or conversions beyond what the campaign would have generated without the CTV touchpoint.
That changes the conversation from attribution alone to contribution.
A campaign might generate relatively few direct CTV-attributed installs while still driving a meaningful incremental lift in total conversions. Conversely, a campaign with a healthy attributed volume may not necessarily be creating incremental outcomes if those users would have converted anyway.
For performance marketers, this is a more useful question than simply asking whether CTV can produce a mobile-style CPI.
CTV and mobile can play complementary roles across the consumer journey. CTV brings the scale, storytelling and attention of the big screen, creating opportunities to introduce products, build consideration and influence intent. Mobile provides an environment where that intent can translate into action—from search and app visits to installs, registrations and purchases.
When these environments work together, advertisers can extend the acquisition journey across screens and use each environment for the moments where it can have the greatest impact. This cross-screen connection is already becoming more tangible in performance campaigns. With CTV App Sync on mDSP, CTV can drive conversions on mobile giving viewers a direct pathway to take action on mobile. For instance, a consumer can scan the code on their TV and continue to the app store or another mobile destination on their phone, creating a clear bridge between CTV exposure and mobile action.
This gives marketers another way to build CTV into mobile UA strategies—using the big screen to generate attention and consideration, and mobile to facilitate the next action. Alongside attribution and incrementality measurement, these cross-screen mechanisms can help advertisers understand and optimise how CTV contributes to acquisition outcomes.
As CTV becomes a larger part of performance media plans, its role will increasingly sit alongside mobile rather than separately from it. The opportunity is to connect the reach and impact of CTV with the actionability of mobile, creating a more connected path from exposure to conversion.