Measure More. Miss Less. Meet Yahoo Conversion API.

Measurement is the backbone of digital advertising- a statement every advertiser can agree with. It’s what originally set digital media apart from traditional formats, where measurement often fell short.

Today,  we’re launching Yahoo Conversion API (CAPI). It’s a solution designed to help advertisers streamline measurement, attribution, and optimization in a privacy-centric way. With Yahoo CAPI, advertisers gain a single, centralized point to send both online (e.g., website, app) and offline conversion data through a simplified integration, making it easier to understand performance and drive more-informed decisions in Yahoo DSP.

Benefits of Yahoo CAPI

• Offline Conversions Included
  CAPI allows Commerce advertisers to bring in offline sales and tie them back to campaign exposure. Providing the complete picture of performance for Commerce Media Networks.
• Easy Integration
  A single integration point lets advertisers send all conversion data, across website, app, and offline sales directly to Yahoo DSP, streamlining the setup process.
• Greater Choice & Control
  Advertisers can transmit data using their own first-party identifiers or integrate through preferred partners, like LiveRamp integration for offline conversion, ensuring flexibility.
• Privacy-Centric
  Powered by Yahoo ConnectID, this solution is resilient to signal loss and privacy-safe, ensuring data security and compliance with privacy laws.

Yahoo CAPI transforms measurement for Commerce Media Networks

Yahoo CAPI is redefining measurement and attribution for Commerce Media Networks by unifying online and offline conversion into a single, streamlined workflow. Unlike most platforms that require separate setups, Yahoo DSP empowers advertisers to optimize campaigns down to the product level with real-time insights regardless of whether conversions happened in-store, on a website, or in an app.

When paired with Yahoo In-Flight Outcomes, our measurement solution that enables you to tie programmatic media investments to real-world outcomes in near real time, you can achieve optimal results. Campaigns are automatically optimized using Yahoo Blueprint Performance, our advanced AI model designed to optimize performance while preserving efficiency and control,  leveraging both online and offline sales data to drive timely, efficient results. This improves the effectiveness of your ad spend and gives you a complete view of ROI across all Yahoo DSP tactics.

With Yahoo CAPI, advertisers have seen a 30–50% increase in attributed conversions for Commerce Media¹.

More precise Measurement (Privacy-Centric and Future-Proofed)

As signal loss grows, and new privacy laws are emerging, accurate measurement becomes more challenging. For example, if your campaigns aren't reaching all types of environments, you're not only limiting your reach, but you’re also missing the ability to fully measure campaign impact.

That’s why Yahoo CAPI is built with Yahoo ConnectID at its core. With access to 232 million logged-in users in the U.S., Yahoo ConnectID ensures more accurate measurement across all environments- including cookieless ones—while maintaining a privacy-centric approach. By securely sharing conversion data with Yahoo DSP, you can tie results directly to campaign exposure and uncover meaningful insights that align with real business outcomes, not just clicks. Yahoo CAPI ensures this is done in a privacy-centric way, keeping data within our ecosystem and prioritizing consumer privacy. Below are results from recent campaigns leveraging the Yahoo CAPI:

• A technology advertiser used Yahoo CAPI to pass hashed email addresses every time a consumer completed a subscription sign-up. The result: 3x more attributed conversions across different channels and devices that would have been harder to measure due to a lack of cookies or advertising IDs².
• A financial services advertiser saw a 4x increase in attributed conversions using the same approach, demonstrating the real impact of privacy-centirc and accurate measurement³.

Yahoo CAPI powers every step of the campaign lifecycle

The benefits of Yahoo CAPI expand beyond measurement, powering every stage of the campaign lifecycle from targeting to optimization and measurement:

Improved Targeting
‍Enhance your targeting strategy by leveraging conversion insights to build and refine custom audiences. Use these insights to reach high-value prospects across channels with modeled audiences.

Impactful Optimization
‍Achieve real-time optimization with Yahoo In-Flight Outcomes by sending conversion signals as they happen. When combined with the power of Yahoo Blueprint Performance, our advanced AI optimization engine, you can automatically adjust campaigns to drive toward your specific business goals, whether that’s sales, sign-ups, or in-store visits.

Holistic Measurement
Get a complete view of your media performance with conversion-based insights. Understand how different formats, devices, and touchpoints contribute to conversion efficiency, so you can make smarter, data-driven decisions across your campaigns.

To learn more about Yahoo CAPI reach out to your Yahoo DSP Account Team.

‍^1-3 Yahoo Internal Data