How are CTV ads delivered to viewers?

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Last updated: April 8, 2026

Quick Answer: CTV ads are delivered to viewers through internet-connected television devices using programmatic advertising technology that targets specific audiences based on data. In 2023, CTV ad spending in the U.S. reached $25.9 billion, growing 21.2% from 2022. Major platforms like Roku, Amazon Fire TV, and smart TVs from Samsung and LG serve ads through apps like Hulu, YouTube, and Netflix's ad-supported tier, which launched in November 2022. Delivery typically involves real-time bidding (RTB) auctions where advertisers bid for ad slots, with ads streamed as video files during content playback.

Key Facts

U.S. CTV ad spending reached $25.9 billion in 2023, a 21.2% increase from 2022
Netflix launched its ad-supported tier in November 2022, expanding CTV inventory
Roku holds approximately 25% of the U.S. CTV market share as of 2023
Programmatic advertising accounts for over 80% of CTV ad transactions
CTV households in the U.S. grew to 87% of TV households by 2023

Overview

Connected TV (CTV) advertising represents the digital evolution of television marketing, delivering ads through internet-connected devices rather than traditional broadcast or cable systems. The technology emerged in the late 2000s with the rise of streaming platforms and smart TVs, gaining significant momentum after 2015 as streaming adoption accelerated. By 2020, CTV had become a mainstream advertising channel, with the COVID-19 pandemic accelerating growth as viewership surged. The market has transformed from basic pre-roll ads on early streaming services to sophisticated, data-driven campaigns across diverse platforms. Major players include device manufacturers like Roku (founded 2002), Amazon Fire TV (launched 2014), and Apple TV, along with content platforms such as Hulu (which introduced ads in 2007), YouTube (founded 2005), and newer entrants like Netflix's ad-supported tier. The shift reflects broader digital transformation in media, with CTV bridging traditional TV's reach with digital advertising's precision.

How It Works

CTV ad delivery operates through a multi-step technical process beginning with audience identification. When a viewer accesses CTV content, the platform collects data points like device type, viewing history, and demographic information (often through first-party data or partnerships). This data triggers programmatic advertising systems where advertisers participate in real-time bidding (RTB) auctions for ad slots, typically using platforms like Google's Display & Video 360 or The Trade Desk. The winning ad is then delivered as a video file streamed alongside content, with formats including pre-roll (before content), mid-roll (during breaks), and post-roll (after content). Ads are served through server-side ad insertion (SSAI) or client-side methods, with SSAI being predominant for seamless viewing. Targeting capabilities include demographic (age, income), behavioral (viewing habits), and contextual (content genre) parameters, enabled by technologies like automated content recognition (ACR) in smart TVs. Measurement uses digital metrics like completion rates, viewability, and attribution tracking through pixels or SDKs.

Why It Matters

CTV advertising matters because it combines television's immersive experience with digital advertising's precision and measurability, addressing the decline of traditional TV viewership. For advertisers, it offers superior targeting compared to linear TV, reducing wasted spend and improving ROI through data-driven campaigns. The impact is significant in media strategy, with CTV enabling cross-device campaigns that bridge living room and mobile viewing. For consumers, it supports ad-supported streaming options that provide affordable access to content, though it raises privacy considerations regarding data collection. The growth of CTV is reshaping the $70+ billion U.S. TV advertising market, driving innovation in ad formats like interactive ads and shoppable TV. As cord-cutting continues, CTV represents the future of television advertising, with projections suggesting it will surpass traditional TV ad spending by 2025.