Connected TV refers to ads served on internet-connected television devices and smart TV apps — think a streaming service's ad break on a smart TV, a Roku home-screen placement, or a connected device like a game console running a streaming app. It's bought and measured more like digital advertising (impression-level logs, programmatic auctions, audience targeting) than linear TV's broad demographic buys, but it's consumed on a living-room screen the way linear TV is, with none of digital video's clickable surface. That hybrid nature is the source of most of the confusion advertisers run into when they treat CTV as either 'just digital video' or 'TV with better targeting' — it's a distinct category with its own tradeoffs.

Linear TV vs. CTV vs. standard digital video (YouTube/social)

Dimension	Linear TV	CTV	Digital video (YouTube/social)
Buying unit	Gross rating points (GRPs), broad demo buys	Impression-based, programmatic or direct	Impression or view-based, self-serve
Targeting granularity	Network/daypart/demo only	Household-level (device/IP-based)	Individual-level, logged-in identity
Skippability	None	Mostly non-skippable	Varies by format (skippable common)
Clickable in-ad action	None	None (QR codes/second-screen only)	Click-to-site common
Measurement granularity	Panel-based estimates (Nielsen-style)	Server-side impression logs + panels for reach dedup	Full impression/click/view logs

How CTV buying actually works

CTV inventory is accessed through several channels: direct deals with streaming platforms (a specific service's ad-supported tier), programmatic buys through demand-side platforms connected to CTV-specific supply (ad exchanges aggregating inventory across many apps and devices), and walled-garden buys through a device manufacturer's own ad platform (e.g., a smart TV OS operator selling its own home-screen and in-app inventory directly). Each path has different minimum spends, targeting capability, and reporting access — programmatic buys typically offer the richest self-serve targeting and reporting, while walled-garden direct deals often trade some transparency for guaranteed placement and scale.

ctv_buy_structure.txt

text

Campaign: CTV - Q4 Launch
  Buy type: Programmatic (DSP-connected CTV supply)
  Targeting: Household income tier, geo (DMA-level), content genre
  Frequency cap: 3 per household per week (cross-device dedup via DSP)
  Creative: 15s and 30s cuts, no clickable CTA (QR code overlay for second-screen)
  Measurement: Server-side impression log + brand lift panel + geo lift test

Household-level targeting, not individual-level

CTV targeting resolves to a device or an IP address tied to a household, not to an individual viewer. This is a structural limitation, not a platform-specific shortcoming: streaming apps generally don't require every household member to log in separately before watching, so an ad server targeting "households that recently shopped for strollers" can't distinguish which specific person in that household is actually watching the show at the moment the ad plays. Compare this to logged-in digital video platforms, where the viewing account is tied to an individual profile with its own behavioral history.

Frequency capping is approximate across a household

Because targeting resolves at the household/device level, a frequency cap meant to limit how often any one viewer sees an ad actually limits how often that device shows the ad — which means if three different household members watch on the same device across a week, the cap constrains the household's total exposure, not any individual's. Advertisers chasing message sequencing (ad A then ad B) on CTV should expect this to work less precisely than the same sequencing on a logged-in individual-level platform.

Reach deduplication across devices and services

A single household often has multiple CTV devices (a smart TV, a streaming stick, a game console) and subscribes to multiple ad-supported streaming services, any of which could serve your ad independently. Without cross-device identity resolution — matching separate device/app sessions back to the same household via a shared identifier, such as an IP match or a data partnership — the same household can be counted as several unique households across different buys, inflating apparent reach. DSPs and measurement partners handle this with probabilistic household graphs, but the match rate is never complete, so reported 'unique reach' on CTV always carries some deduplication uncertainty that doesn't exist to the same degree on logged-in digital platforms.

QR codes are the closest thing CTV has to a click

Since there's no clickable surface on a TV screen, many CTV ads overlay a QR code as a second-screen action — the viewer scans it with their phone to land on a mobile page. It captures only the subset of viewers motivated enough to pick up a second device mid-ad, so it functions as a direct-response signal layered on top of (not a replacement for) the impression-based reach and lift measurement that carries most of CTV's attribution weight.

What's next

Out-of-home advertising shares CTV's core problem in a more extreme form — no impression log at all, no device ID, nothing but physical presence near a static or digital placement — which is why OOH leans even more heavily on location data and lift-study proxies to approximate exposure.

Next: Out-of-Home (OOH) Advertising Attribution →

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