CTV Graduates, Definitions Still Matter. What’s in a Name?

This time of year, caps and gowns mark a transition from one stage to the next. The Advanced TV ecosystem is experiencing something similar. Not long ago, the industry spent considerable time debating a simple question:

What’s the difference between OTT and CTV?

At the time, that debate reflected a younger and rapidly evolving ecosystem. Today, we’re still rapidly evolving, but the question still matters for a different reason. Advanced TV is no longer emerging. It is maturing.

Or more simply, CTV has grown up! One recent example of that maturity is the ‘Questions to Consider Asking Connected and Streaming TV Partners’ guidance developed by IAB Tech Lab in partnership with the WFA.

Definitions Driving Implementation

At a basic level:

OTT describes how content is delivered over IP (internet protocol)
CTV describes where it is consumed on connected television devices

That distinction remains unchanged. What has changed is the impact. These definitions now influence how standards are implemented across the ecosystem:

In OpenRTB 2.6, devicetype attribute and the content object help define CTV supply and inform buying logic
In VAST 4.3, standardized signaling for SSAI, ad verification, and creative assets improves consistency across CTV environments for buyers, sellers, and measurement providers
In AdCOM, structured objects support consistent signaling for video transactions

What was once a semantic distinction is now a technical dependency.

From Definitions to Execution

As with any ecosystem moving onto its next stage of development, the industry has shifted focus:

From defining environments to standardizing them
From enabling access to ensuring consistency
From experimentation to interoperability

That shift is visible in the CTV Ad Portfolio. Formats like pause ads, menu ads, and overlays have existed for years. What’s new is the standardized way to describe the inventory of these ad units using OpenRTB/AdCOM, the Native API and VAST.

Because of these standardized signals, buyers and sellers have gained:

A common way to describe CTV ad formats
Clearer expectations for rendering and user experience
Scalable programmatic activation

As a result, companies have to create fewer custom implementations and consumers see more predictable experiences across platforms. This creates value for all parties in the transaction with both efficiency and impact.

Measurement Moves to the Center

Measurement has moved from a point of innovation to a point of accountability. Key standards reflect this shift:

VAST 4.3 supports SSAI and improved signaling
SIMID enables secure interactivity
OM SDK for CTV extends third-party verification with additional signals for device attestation, whether the screen is on, and how long that binge-watching session has lasted
ACIF’s Universal Ad ID enables more effective cross-platform reporting

At the same time, server-to-server approaches such as conversion APIs, including the standardized ECAPI specification, are helping connect exposure to outcomes. The goal is clear. Measurement must be consistent, comparable, and trusted.

Live Streaming Raises the Bar

Live streaming environments continue to test the ecosystem. High concurrency and real-time decisioning expose challenges in:

Improving fill rates
Reducing the latency risk for both consumers and bidstream participants
Forecasting expected audiences to help manage QPS and bandwidth needs
Ad pod execution commitments

Tech Lab efforts such as the Live Event Ad Playbook (LEAP) and signaling approaches, such as podded bidding, which are now seeing adoption in the ecosystem, aim to ensure that every opportunity results in a valid impression.

This is where CTV begins to meet broadcast-level expectations and truly comes of age.

Interoperability Enables Scale

As the ecosystem matures, interoperability becomes essential. Standards such as OpenRTB2.6 and AdCOM, VAST 4.x and SIMID, OM SDK, and ads.txt enable consistent transactions, transparent supply paths, and scalable measurement. These standards do not limit innovation. They allow it to scale.

So… OTT vs. CTV?

The distinction still matters. It informs supply classification, ad delivery, and measurement approaches. In practice, the industry has aligned around CTV as the primary commercial focus, with OTT as the delivery mechanism behind it. There may still be variations from a global perspective of course, and the term Streaming is also often used interchangeably when discussing the new world of television viewing.

CTV Has Graduated

Over the past two decades, Advanced TV has moved from experimentation to infrastructure. Today’s challenges are not about “finding ourselves”. We’re focused on operating effectively at scale. Measurement consistency, fraud prevention, interoperability, and live event execution are complex problems we’re on track to collectively solve and adopt.

“OTT vs. CTV” began as a naming discussion. Today, it reflects something more important. Definitions must translate into systems that work consistently across the ecosystem. The industry is no longer asking what to call things. It is building the standards to make them work together.

Like any graduation, reaching this point is not an end state. It is a transition to greater expectations. That is what maturity looks like. Efficient. Value-focused. Standardized.