The Koah team has been hard at work developing innovative ad formats, and two standouts have emerged: suffix ads on mobile and sponsored sources on the web. Let's explore how they work and examine their performance metrics.

Suffix Ads on Mobile: A Game Changer for User Engagement

Let's start with suffix ads on mobile. These ads have proven to be exceptional performers, especially for our customer Heal. What exactly are suffix ads? They're ads that smoothly attach to the end of content generated by a large language model (LLM), featuring a flashing call-to-action (CTA) button that catches the eye while maintaining a seamless user experience.

For Heal, the results have been remarkable. We're seeing click-through rates (CTR) of 6%—dramatically higher than typical Google search ads or banner ads. For perspective, traditional banner ads usually achieve less than 1% CTR, and even search ads rarely reach these levels. What's behind this impressive performance?

• Contextual Ad Copy Generated On-the-Fly: Koah creates personalized ad copy in real-time based on the user's current content interaction, ensuring relevant and timely messaging.

• Brand-Safe Assurance: We maintain a secure environment for advertisers by ensuring perfect alignment between ad content, brand values, and publisher content.

• Animated CTA Button: The CTA button smoothly transitions from gray to the publisher's app theme color, creating an eye-catching yet harmonious design element.

• Customized CTA Text: Advertisers can customize their call-to-action text to match their ad copy, maximizing relevance and impact.

Picture this: A user is reading health tips generated by an LLM in Heal's app. When they finish, they see a suffix ad with a pulsing "Learn More" button that matches the app's blue theme perfectly, offering a relevant wellness product deal. This seamless integration is what makes suffix ads so effective.

Sponsored Sources on the Web: Leveraging Credibility for Results

Next, we turn to sponsored sources on the web, launched with our customer Liner. Liner's app has achieved remarkable engagement, with their sources unit reaching CTRs around 20%. The secret? Liner underlines portions of LLM-generated text and links them to credible sources, building trust and encouraging users to dig deeper.

Recognizing this success, we integrated a sponsored ad unit into the sources list. Even though these ads appear at the bottom—where users need to scroll to see them—they're achieving CTRs of 1%-2%. These preliminary numbers fluctuate by day and content, but they're impressive for ads that aren't immediately visible.

Here's why this format succeeds:

• Built-In Credibility: Liner's sources unit has established itself as a trusted feature through reliable reference linking.

• Strategic Ad Placement: The sponsored citation blends seamlessly into the existing list structure.

Picture this: A user reads an LLM-generated article on Liner, notices underlined text with source links, and discovers a relevant sponsored citation at the bottom. The high engagement—users actively scrolling and clicking—demonstrates the format's effectiveness.

Insight: Why Mobile Outshines Web

One trend stands out in our data: mobile ads outperform web ads, and it comes down to screen real estate. Because mobile screens are smaller, ad units naturally occupy a larger portion of the display. This makes them more visible, more frequently, and for longer—key factors driving higher CTRs. While desktop users can easily skim past an ad, mobile users find them more difficult to ignore. This dynamic explains why suffix ads on mobile achieve 6% CTRs while web formats like sponsored sources continue optimizing toward their peak performance.

Wrapping up

The launch of suffix ads on mobile and sponsored sources on the web represents a breakthrough for our company. With Heal achieving 6% CTR and Liner reaching 1%-2% CTR, these formats aren't just outperforming industry standards—they're revolutionizing digital advertising. Through the powerful combination of contextual relevance, user-friendly design, and data-driven tweaks, we're creating real value for both customers and their audiences.

We're continuously optimizing these ad units by fine-tuning colors, adjusting placements, and implementing other improvements. The results are already impressive, and they're only going to get better. Stay tuned as we continue pushing the boundaries of ad performance. The future of advertising isn't just coming—it's already here.