AdRoll launches CTV growth guide to baseline advertiser performance metrics

The shift toward performance-based CTV is accelerating as advertisers demand the same level of accountability found in search and social. By formalizing a guide for measurement and conversion, AdRoll is addressing the primary barrier to entry for mid-market brands: the inability to prove incremental lift. As the ecosystem moves away from simple reach metrics toward outcome-based pricing, tools that standardize attribution across fragmented apps will become essential components of the ad tech stack. Watch for whether advertisers start adopting third-party incrementality testing over internal platform reporting as their primary success signal.

The push for greater CTV accountability comes as U.S. ad spend on the channel is projected to reach approximately $38 billion in 2026, a 14% year-over-year increase per eMarketer. This growth is increasingly funded by reallocations from linear TV budgets, which are projected to decline by 11% in the same period. Despite this influx of capital, the industry faces significant technical hurdles; a March 2026 survey by Advertiser Perceptions found that one-third of advertisers still struggle with deduplicated reach and walled gardens, highlighting the ongoing friction in cross-platform planning.

Simultaneously, the nature of CTV interaction is evolving from passive viewing to active engagement. According to research from Rakuten TV in June 2026, while nearly 58% of advertisers still utilize traditional pre-roll and mid-roll formats, only 6% consider them the most effective. This has led to a surge in alternatives like homescreen and pause ads, with investment in homescreen placements forecast to grow by 65%. Marketers are searching for viewer-first formats that minimize disruption while maximizing attention-based metrics, which are now being positioned as a bridge between awareness and conversion.

Technical standards are also maturing to support this performance pivot. The adoption of OpenRTB 2.6 and refined Server-Side Ad Insertion (SSAI) has enabled more precise household-level targeting and real-time bid optimization. Per recent industry reports from May 2026, AI-powered systems are now managing frequency and saturation in cookieless environments, allowing brands to maintain efficient ROAS while navigating a highly fragmented supply chain. This technical foundation is what allows companies like AdRoll to offer deeper attribution models that link big-screen impressions to mobile and desktop site visits.