Glossary
ACR (Automatic Content Recognition)
Automatic Content Recognition (ACR) is technology built into Smart TVs that identifies what’s playing on the screen — by analyzing a small fingerprint of the audio or video signal and matching it against a reference database. In 2026, ACR is the technology powering view-through attribution for YouTube influencer ads on connected TVs — the surface where 60–80% of YouTube watch time now happens.
How ACR Works
Every video and audio file has a unique signature. ACR technology samples a few milliseconds of what’s playing on a Smart TV, generates a fingerprint, and matches it against a reference database of known content. When a match is found, the platform knows exactly which video — and which ad — appeared on that screen.
This happens entirely on-device and doesn’t require:
- A cookie or browser session
- A click or interaction
- An app to be installed
- The viewer to do anything
It’s fundamentally different from cookie-based digital tracking, which is why ACR can see what cookie-based attribution can’t.
Why ACR Matters for Influencer Marketing in 2026
For the entire history of influencer marketing, attribution has been tied to clicks, codes, and surveys. None of those methods can see what happens on a Smart TV — and 60–80% of YouTube watch time now happens on connected TVs.
ACR closes that gap. By detecting which households were exposed to a specific influencer ad on a Smart TV, and matching that exposure against downstream conversion data, ACR enables true view-through attribution for influencer marketing — measuring the conversions an influencer campaign drove from people who saw the ad on TV but bought through a different channel later.
Passo is the first influencer marketing platform built around Smart TV ACR for view-through attribution. See The Influencer Attribution Gap for the full breakdown of why this matters.
Frequently Asked Questions
Does ACR work on every Smart TV?+
ACR is built into most major Smart TV brands sold in the US, including Samsung, LG, Vizio, Sony, and the streaming devices (Roku, Amazon Fire TV) that power many “smart” features on older sets. Coverage varies by region and model year but in 2026 includes the vast majority of US connected TVs.
Is ACR data privacy-compliant?+
ACR data is collected at the household level (not individual), and major ACR providers offer opt-out mechanisms. Used for influencer attribution, ACR matches aggregate exposure data against aggregate conversion data — no individual user is identified.
Why didn’t anyone use ACR for influencer marketing before 2026?+
The technology has existed for over a decade, but the analytical pipelines connecting Smart TV exposure data to brand conversion data didn’t exist at the influencer-campaign level until recently. Passo built that infrastructure as part of its core platform.
Related
- The Influencer Attribution Gap — the pillar guide on why attribution is broken
- The 9 Best Influencer Attribution Tools in 2026
- Passo Measurement — how Passo uses ACR for influencer attribution
See ACR attribution in action
Passo is the only influencer platform with native Smart TV ACR view-through attribution. Talk to us to see what your campaigns are actually driving.