Connected TV advertising: maximizing ROI for US agencies

The 2026 CTV Landscape: Growth, Opportunity, and the ROI Imperative for Agencies

The landscape of Connected TV (CTV) advertising in 2026 marks a pivotal moment for US agencies. This year, CTV is not just growing; it’s asserting its dominance, with projected ad spend set to reach an impressive $37.95 billion. This robust expansion is underscored by the IAB’s 2026 Ad Spend Forecast, which predicts a substantial +13.8% year-over-year growth, making CTV the second-fastest growing channel behind social media.

A clear indicator of CTV’s market ascendancy is the forecast that, for the first time in 2026, CTV upfront commitments will surpass those of primetime linear TV, reaching $17.73 billion compared to linear’s $16.98 billion. This shift signals a fundamental reallocation of advertising budgets towards digital, streaming environments.

Key Opportunity

The ‘attention gap’ in CTV — 43.8% of TV usage versus only 7.7% of total ad spend — represents a massive, untapped audience for advertisers in 2026. Agencies that can effectively monetize this disparity will unlock significant value.

Despite this remarkable growth, a significant ‘attention gap’ persists, presenting a tremendous opportunity for savvy advertisers. While CTV now accounts for 43.8% of total TV usage in the US, it captures only about 7.7% of total ad spend. This disparity highlights an underserved, highly engaged audience ripe for targeted campaigns. For US agencies, understanding and effectively bridging this gap is paramount. In this scaled, competitive environment, the imperative to prove tangible Return on Investment (ROI) for clients has never been stronger, demanding sophisticated strategies to maximize every ad dollar.

Navigating Measurement Challenges: Proving CTV Incrementality in 2026

Despite Connected TV (CTV) advertising’s impressive trajectory—projected to capture $37.95 billion in US ad spend in 2026 and with upfront commitments now exceeding primetime linear TV—a significant hurdle for US agencies remains fragmented measurement. Traditional pixel tracking, designed for a simpler web environment, struggles profoundly to connect cross-device actions and prove true incrementality in the complex CTV ecosystem. This “attention gap,” where CTV accounts for 43.8% of total TV usage but only about 7.7% of total ad spend, underscores the urgent need for robust attribution to unlock the channel’s full potential.

Agencies are grappling with the challenge of accurately understanding how CTV ad exposures influence downstream actions, whether it’s a website visit on a mobile phone or an in-app purchase on a tablet. Without a clear, unified path to attribute conversions, demonstrating the incremental value of CTV spend becomes a complex endeavor, particularly as programmatic buying now accounts for 84% of CTV ad spend, enabling highly precise but also complex targeting strategies.

To overcome these challenges, the industry is rapidly adopting sophisticated solutions. Data clean rooms offer secure, privacy-compliant environments for advertisers and publishers to match and analyze first-party data, providing a more holistic view of the customer journey. Unified ID solutions aim to create persistent, privacy-safe identifiers that can track users across screens without relying on traditional cookies. Furthermore, advanced analytics platforms, often powered by AI, are becoming indispensable, offering multi-touch attribution models that go beyond last-click to assign credit across all touchpoints. These innovations are crucial for the 56% of advertisers planning to increase CTV spending in 2026, who demand verifiable ROI and clearer insights into the channel’s ability to reach engaged audiences.

Advanced Strategies for Optimal CTV Campaign Performance and ROI

As Connected TV (CTV) ad spend is projected to reach approximately $37.95 billion in 2026, US agencies are honing sophisticated strategies to maximize client return on investment. A cornerstone of this evolution is programmatic buying, which now accounts for an impressive 84% of CTV ad spend. This widespread adoption allows for unparalleled precision in targeting, ensuring ads reach the most relevant audiences and enabling continuous, in-flight optimization for superior campaign performance.

Leveraging AI-driven insights is another critical differentiator. Agencies are employing artificial intelligence to conduct granular audience segmentation and facilitate real-time bid adjustments, optimizing spend for maximum impact. This analytical prowess is a significant driver behind the nearly 70% of advertisers planning to increase their CTV spending in 2026, confident in the channel’s ability to reach engaged viewers and prove value through advanced insights.

Creative optimization is equally vital. The living room screen is rapidly evolving into a dynamic transaction surface with the rise of interactive and shoppable ad formats, projected to make up 10% of all CTV ads by 2026. Agencies are strategically integrating features like increased QR code usage, providing viewers with a direct, seamless path from ad engagement to immediate action and purchase, thereby transforming passive viewing into active participation and driving measurable direct response.

• ✓ Harness programmatic buying for precise audience targeting and dynamic optimization.
• ✓ Integrate AI-driven insights for advanced audience segmentation and real-time bid management.
• ✓ Develop interactive and shoppable ad creatives to engage viewers and drive direct response.
• ✓ Utilize QR codes effectively to bridge the gap between CTV ads and immediate user action.

Essential Tools: Unlocking Deeper Attribution and Optimization in CTV

As US connected TV (CTV) ad spend is projected to hit approximately $37.95 billion in 2026, agencies face a critical need for robust technological infrastructure to maximize ROI. The complexity of CTV, with its cross-device nature and fragmented measurement, necessitates a sophisticated tech stack that aggregates data, streamlines workflows, and provides a clearer picture of campaign effectiveness.

At the core are Demand-Side Platforms (DSPs) with advanced CTV capabilities. These platforms are essential for programmatic buying, which now accounts for 84% of CTV ad spend, enabling precise targeting, dynamic bidding, and real-time optimization. Complementing DSPs are cross-device identity graphs. These critical tools link user behavior across various devices, addressing the challenge of measurement fragmentation and helping agencies understand audience journeys beyond a single screen, thereby improving reach and personalization.

To truly prove value and incrementality, attribution modeling platforms are indispensable. They move beyond last-touch models, leveraging data from identity graphs and DSPs to assign credit accurately across the complex CTV funnel. This is vital given traditional pixel tracking often struggles to connect cross-device actions. Finally, unified reporting dashboards integrate data from all these sources, presenting a holistic view of campaign performance. These dashboards consolidate impressions, clicks, conversions, and audience insights, empowering agencies with actionable intelligence to refine strategies and demonstrate tangible ROI.

By integrating these essential tools, agencies can overcome CTV’s inherent complexities, transforming raw data into strategic insights and ensuring that nearly 70% of advertisers planning to increase their CTV spending in 2026 see measurable returns.

The Future-Forward Agency: Proving Value and Building Client Confidence in CTV

Agencies in 2026 face the critical task of not just executing Connected TV (CTV) campaigns but also unequivocally demonstrating their impact. While nearly 70% of advertisers already plan to increase their CTV spending this year, recognizing its power to reach engaged audiences and leverage AI-driven insights, agencies must solidify this confidence. A significant hurdle remains the fragmentation of CTV measurement, where traditional pixel tracking often struggles to connect cross-device actions and prove incrementality.

To overcome this, leading agencies are shifting beyond simplistic last-click models to embrace sophisticated full-funnel attribution strategies. This involves leveraging advanced analytics to map user journeys across various touchpoints, truly understanding CTV’s contribution to conversions and brand lift. Clear, transparent reporting is paramount, translating complex data into actionable insights that directly link CTV investment to tangible business outcomes. By adopting advanced measurement tools and programmatic insights—which now account for 84% of CTV ad spend, enabling more precise targeting and in-flight optimization—agencies can provide unparalleled clarity.

This strategic evolution not only proves value but also positions agencies as indispensable partners, driving client success and fostering long-term, high-value relationships in the dynamic CTV landscape.

Summary

Agencies must demonstrate CTV ROI in 2026 by shifting to full-funnel attribution and providing transparent reporting. Overcoming measurement fragmentation with advanced analytics and leveraging programmatic buying’s precise targeting capabilities will build client confidence, driving increased spending and fostering long-term partnerships.