Connected TV advertising has become one of the fastest-growing segments in digital advertising. As consumers shift from linear television to streaming services, advertisers are following with budgets that increasingly flow toward CTV. This channel offers a unique combination: the large-screen, lean-back viewing experience of traditional TV with the targeting precision and measurability of digital advertising.
CTV vs. OTT: Understanding the Terminology
The terms CTV and OTT are often used interchangeably, but they refer to different things.
OTT (Over-the-Top) refers to content delivered over the internet without requiring a traditional cable or satellite subscription. OTT is a content delivery method. Netflix, Hulu, Disney+, and YouTube TV are all OTT services. OTT content can be watched on any device: phones, tablets, laptops, or televisions.
CTV (Connected TV) refers specifically to the device used to stream content on a television screen. This includes smart TVs with built-in internet connectivity, streaming devices like Roku, Amazon Fire TV, and Apple TV, and gaming consoles like PlayStation and Xbox when used for streaming. CTV is a device category.
When advertisers talk about CTV advertising, they typically mean ads served on television screens through internet-connected devices, regardless of which OTT service is delivering the content.
Why CTV Advertising Is Growing
Several factors are driving the rapid growth of CTV ad spending, which is projected to exceed $40 billion in the United States alone by 2027:
- Audience migration: Cord-cutting continues to accelerate. More than 50 million U.S. households have cancelled traditional pay TV subscriptions, and many younger viewers have never subscribed at all.
- AVOD and FAST growth: Ad-supported streaming tiers from major platforms (Netflix, Disney+, Amazon Prime Video) have dramatically expanded the available CTV ad inventory. Free ad-supported streaming TV (FAST) services like Tubi, Pluto TV, and Freevee have also grown rapidly.
- Targeting advantages: Unlike linear TV, which targets broad demographics, CTV enables granular audience targeting based on household data, viewing behavior, and cross-device identity graphs.
- Measurability: CTV offers impression-level reporting and the ability to connect ad exposure to downstream actions, a significant improvement over linear TV's panel-based measurement.
CTV Ad Formats
CTV supports several ad formats, each with different viewer experiences and performance characteristics:
Pre-Roll, Mid-Roll, and Post-Roll
These are video ads that play before, during, or after streaming content. Mid-roll ads typically deliver the highest completion rates because viewers are invested in the content they are watching. Most CTV ads are non-skippable, resulting in completion rates above 95 percent, far higher than desktop or mobile video.
Interactive Ads
CTV platforms increasingly support interactive ad formats that allow viewers to engage using their remote control. Viewers can click to learn more, scan a QR code on screen, or navigate to a specific landing page. These formats drive higher engagement but require creative specifically designed for the TV experience.
Pause Ads
Some platforms display ads when the viewer pauses content. These are typically static or subtly animated display units that appear on the pause screen. They offer a non-intrusive touchpoint that reaches viewers at a moment of natural attention.
Home Screen and Content Discovery Ads
Ads placed on the home screen of streaming devices or within content recommendation interfaces. These placements offer high visibility but are typically available only through direct deals with device manufacturers or streaming platforms.
How CTV Ad Buying Works
CTV inventory can be purchased through several channels:
Programmatic
The majority of CTV ad spending now flows through programmatic channels. DSPs like The Trade Desk, DV360, and Amazon DSP offer access to CTV inventory from multiple publishers and exchanges. Programmatic buying enables audience targeting, frequency management, and real-time optimization across publishers.
Direct and Programmatic Guaranteed
Premium CTV inventory is often sold through direct deals or programmatic guaranteed arrangements. Major streaming platforms like Hulu, Peacock, and Paramount+ offer upfront and scatter market deals that guarantee specific reach and frequency levels against defined audiences.
Self-Serve Platforms
Platforms like Roku Ads Manager, Amazon's sponsored TV, and YouTube's CTV placements offer self-serve buying options that lower the barrier to entry for smaller advertisers. These platforms simplify targeting and creative requirements while providing access to significant CTV audiences.
Targeting Capabilities
CTV targeting leverages a combination of data sources:
- First-party streaming data: Viewing history, content preferences, and subscription information from streaming platforms
- Device-level data: Automatic content recognition (ACR) technology in smart TVs tracks what content is displayed on screen, enabling targeting based on viewing behavior
- Household-level data: IP address matching links CTV devices to household demographics, purchase behavior, and other data sources
- Cross-device identity: Identity graphs connect CTV devices to mobile phones, tablets, and computers within the same household, enabling sequential messaging and cross-device attribution
CTV Measurement and Attribution
Measurement is both CTV's advantage over linear TV and its greatest ongoing challenge.
Available Metrics
CTV campaigns can be measured on completion rates, reach and frequency at the household level, brand lift through survey-based studies, website visit attribution using IP matching, foot traffic attribution through location data partners, and sales lift through purchase data integrations.
Measurement Challenges
Despite these capabilities, CTV measurement faces obstacles. Fragmentation across platforms makes cross-publisher frequency management difficult. Walled gardens limit transparency into some metrics. The lack of a universal CTV identifier complicates audience deduplication. Industry groups including the IAB and the Media Rating Council are working to establish standards, but the measurement landscape remains fragmented.
CTV Creative Best Practices
Effective CTV creative differs from both linear TV and digital video:
- Design for the big screen: CTV ads are viewed on large displays in living rooms. High production value matters more than in mobile or desktop environments.
- Use the non-skip advantage wisely: With completion rates above 95 percent, there is no need to front-load the message. Use the full duration to tell a story.
- Include clear calls to action: Tell viewers what to do next, whether that is visiting a URL, scanning a QR code, or searching for a product.
- Adapt frequency: In a co-viewing household environment, excessive frequency can create negative brand sentiment more quickly than on personal devices.
The Future of CTV Advertising
CTV advertising is evolving rapidly. Shoppable TV ads that allow viewers to purchase products directly from the ad experience are gaining traction. Addressable advertising, where different households watching the same content see different ads, is becoming standard. As measurement standards mature and inventory continues to grow, CTV will likely become the primary channel for brand advertising, inheriting linear TV's role as the dominant reach medium while delivering the accountability that digital advertisers expect.
