How does radius targeting work for CTV ads?

Content on WhatAnswers is provided "as is" for informational purposes. While we strive for accuracy, we make no guarantees. Content is AI-assisted and should not be used as professional advice.

Last updated: April 8, 2026

Quick Answer: Radius targeting for CTV ads uses geographic location data to serve ads to households within a specific distance from a business location, typically measured in miles or kilometers. This technology leverages IP addresses and device location services to identify viewers within the target radius, allowing advertisers to reach local audiences more effectively. For example, a restaurant might target households within a 5-mile radius to promote daily specials, while a car dealership could extend to a 20-mile radius for broader reach. This method enhances ad relevance and can improve conversion rates by focusing on potential customers who are geographically close to the point of sale.

Key Facts

Radius targeting typically uses distances ranging from 1 to 50 miles (1.6 to 80 km) for CTV ads
Over 80% of CTV devices in the U.S. support location-based targeting as of 2023
Ad recall can increase by up to 30% when using radius targeting compared to broad geographic campaigns
This technology became widely available for CTV platforms around 2018 with advancements in IP geolocation
Radius targeting can reduce wasted ad spend by up to 40% by excluding viewers outside the target area

Overview

Radius targeting for Connected TV (CTV) ads is a digital advertising technique that allows marketers to deliver video ads to households within a specific geographic radius from a business location or point of interest. This approach evolved from traditional local television advertising and digital geotargeting methods, gaining prominence with the rise of CTV platforms like Roku, Amazon Fire TV, and smart TVs. The technology became commercially viable around 2018 as IP geolocation accuracy improved and CTV adoption surged, with over 85% of U.S. households having at least one CTV device by 2023. Unlike traditional TV advertising that targets broader DMA (Designated Market Area) regions, radius targeting provides precise, hyper-local reach, making it particularly valuable for businesses with physical locations such as retailers, restaurants, and service providers. This method represents a significant advancement in addressable TV advertising, combining the scale of television with the precision of digital marketing.

How It Works

Radius targeting for CTV ads operates through a multi-step process that begins with location data collection. When viewers use CTV devices, their IP addresses and, when available, device-level location services provide geographic coordinates. Ad platforms use this data with geolocation databases to map households to specific latitudes and longitudes, typically accurate within 1-5 miles for IP-based methods. Advertisers then set a target radius (e.g., 10 miles) around their business locations using platform interfaces. When a CTV device within this radius requests ad inventory, the ad platform checks the household's location against the target area and serves the relevant ad if it matches. This process happens in real-time during ad auctions, with additional layers like household data enrichment helping to verify locations. The technology often integrates with programmatic advertising systems, allowing for automated bidding and optimization based on performance metrics like foot traffic or online conversions from the targeted area.

Why It Matters

Radius targeting matters because it addresses a critical gap in CTV advertising: connecting digital ad spend to real-world business outcomes. For local businesses, it enables cost-effective customer acquisition by focusing budgets on nearby potential customers who can easily visit physical locations. This precision reduces wasted impressions and can significantly improve return on ad spend (ROAS), with some studies showing up to 3x higher efficiency compared to non-targeted CTV campaigns. The technology also supports omnichannel marketing strategies, allowing advertisers to coordinate CTV ads with other local channels like search and social media. As privacy regulations evolve, radius targeting offers a compliant approach to location-based advertising since it typically uses aggregated, non-personal data. Ultimately, it helps democratize TV advertising by making it accessible to small and medium businesses that previously couldn't afford traditional TV buys.