What is the TAG certification for CTV?

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Last updated: April 8, 2026

Quick Answer: The TAG certification for CTV is a verification program launched in 2019 by the Trustworthy Accountability Group (TAG) to combat ad fraud in connected TV advertising. It certifies CTV devices, apps, and platforms that meet specific security standards, including preventing invalid traffic and ensuring transparency. As of 2023, TAG reported that certified CTV inventory saw fraud rates drop to below 1%, compared to industry averages of 2-3%. The program addresses the rapid growth of CTV ad spending, which reached $21.2 billion in the U.S. in 2022.

Key Facts

Launched in 2019 by the Trustworthy Accountability Group (TAG)
Reduces CTV ad fraud rates to below 1% for certified inventory (2023 data)
U.S. CTV ad spending was $21.2 billion in 2022
Certifies CTV devices, apps, and platforms meeting anti-fraud standards
Addresses invalid traffic and ensures transparency in CTV advertising

Overview

The TAG certification for CTV is a specialized program developed by the Trustworthy Accountability Group (TAG), an advertising industry initiative founded in 2014 to fight digital ad fraud. As connected TV (CTV) viewership surged—with over 200 million CTV users in the U.S. alone by 2022—advertisers shifted spending to this platform, but faced rising fraud risks like bot traffic and spoofed inventory. In response, TAG launched its CTV certification in 2019, building on its existing anti-fraud programs for web and mobile. The certification targets CTV ecosystems, including smart TVs, streaming devices (e.g., Roku, Amazon Fire TV), and apps, requiring adherence to strict guidelines. By 2021, major players like Roku and Disney had achieved certification, helping secure a market where CTV ad fraud was estimated to cost over $1 billion annually. The program aligns with TAG's broader mission, supported by groups like the IAB and ANA, to create a transparent digital supply chain.

How It Works

The TAG certification process for CTV involves several key steps to verify compliance with anti-fraud standards. First, CTV entities—such as device manufacturers, app developers, or ad platforms—apply for certification and undergo an audit by TAG-approved third-party validators. They must implement technical measures like ads.txt or app-ads.txt files to prevent domain spoofing, ensuring only authorized sellers can offer inventory. Additionally, certified parties use TAG's Fraud Threat List to block known malicious IP addresses and employ traffic monitoring to detect invalid traffic, such as bots or non-human views. The certification also requires transparency in data reporting, with clear metrics on ad delivery and viewability. Once certified, entities receive a TAG seal and are listed in a public registry, with annual recertification needed to maintain status. This process helps create a trusted CTV environment by reducing fraud vectors like CTV-specific schemes (e.g., device hijacking or fake app installs).

Why It Matters

The TAG certification for CTV matters because it directly impacts the integrity and growth of the CTV advertising market, which is projected to exceed $30 billion in the U.S. by 2025. By certifying inventory, it builds advertiser confidence, reducing wasted spend on fraud and ensuring ads reach real viewers. This is crucial as CTV blends digital targeting with TV-like engagement, but without certification, fraud could undermine its premium value. The program also supports industry standardization, encouraging wider adoption of best practices across streaming platforms. Ultimately, it helps sustain CTV's appeal as a high-ROI channel, fostering innovation in areas like addressable ads and interactive content while protecting consumer trust.