Why did click-through rates on Baidu Search ads decrease by 8% this month compared to last month?

Introduction

The recent 8% decrease in click-through rates on Baidu Search ads is a concerning trend that requires immediate attention. As we analyze this product issue, we'll follow a systematic framework to identify, validate, and address the root cause while considering both immediate and long-term implications for Baidu's ad performance.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking there might be seasonal factors at play. Has this 8% decrease been compared to the same month last year?

Why it matters: Seasonal trends can significantly impact ad performance. Expected answer: Yes, it has been compared, and the decrease is still present. Impact on approach: If seasonal, we'd focus on year-over-year comparisons rather than month-to-month.

• Considering user segments, I'm curious about the distribution of this decrease. Is the 8% drop uniform across all user segments or concentrated in specific groups?

Why it matters: Identifying affected segments can pinpoint the issue's source. Expected answer: The decrease is more pronounced in mobile users. Impact on approach: We'd prioritize investigating mobile-specific factors and user experience.

• Thinking about recent changes, have there been any significant updates to the ad serving algorithm or UI in the past month?

Why it matters: Recent changes could directly impact click-through rates. Expected answer: A minor UI update was implemented two weeks ago. Impact on approach: We'd focus on analyzing the impact of this UI change on user behavior.

• Regarding competitive landscape, have there been any notable changes in competitor strategies or market conditions?

Why it matters: External factors could be influencing user behavior across the industry. Expected answer: No significant changes noted in competitor strategies. Impact on approach: We'd focus more on internal factors rather than market-wide trends.