Why has Xandr's Monetize SSP experienced a 20% decline in fill rate for video inventory this month?

Introduction

Xandr's Monetize SSP experiencing a 20% decline in fill rate for video inventory is a critical issue that demands immediate attention. This analysis will systematically identify, validate, and address the root cause while considering both short-term and long-term implications for the product and business.

To tackle this problem, I'll follow a structured approach that covers issue identification, hypothesis generation, validation, and solution development. My goal is to provide a comprehensive analysis that not only addresses the immediate concern but also sets the stage for long-term improvements in Xandr's video inventory performance.

Step 1

Clarifying Questions (3 minutes)

• Given the sudden drop, I'm wondering about recent changes. Have there been any significant updates to Xandr's Monetize SSP platform in the past month?

Why it matters: Recent changes could directly impact fill rates. Expected answer: Yes, there was a major update to the bidding algorithm. Impact on approach: If confirmed, we'd focus on the new algorithm's performance.

• Considering the specificity to video inventory, I'm curious about the performance of other formats. Has there been any change in fill rates for display or native ad inventory?

Why it matters: Helps isolate if this is a video-specific issue or a broader platform problem. Expected answer: No significant changes in other formats. Impact on approach: If true, we'd concentrate on video-specific factors.

• Looking at the timing, I'm thinking about seasonal trends. Is this 20% decline unusual compared to the same period in previous years?

Why it matters: Distinguishes between cyclical patterns and anomalous declines. Expected answer: This decline is significantly larger than usual seasonal variations. Impact on approach: If confirmed, we'd rule out seasonality and focus on recent changes or market shifts.

• Considering potential data discrepancies, I'm wondering about measurement consistency. Has there been any change in how fill rate is calculated or measured in the past month?

Why it matters: Ensures we're comparing apples to apples in our analysis. Expected answer: No changes in measurement methodology. Impact on approach: If there were changes, we'd need to reassess the actual impact and potentially recalibrate our metrics.