Why has the average time spent on Nextdoor's For Sale & Free marketplace section declined by 5 minutes per session this quarter?

Introduction

The decline in average time spent on Nextdoor's For Sale & Free marketplace section by 5 minutes per session this quarter is a concerning trend that requires thorough investigation. To address this issue, I'll employ a systematic approach to identify, validate, and resolve the root cause while considering both immediate and long-term implications for the product.

Step 1

Clarifying Questions (3 minutes)

• Considering the timing, I'm wondering if there have been any recent product updates. Have there been any significant changes to the For Sale & Free marketplace in the last quarter?

Why it matters: Recent changes could directly impact user behavior. Expected answer: Yes, we implemented a new recommendation algorithm. Impact on approach: If confirmed, we'd focus on analyzing the algorithm's performance and user reception.

• Looking at user segments, I'm curious about the distribution of this decline. Is the 5-minute decrease consistent across all user groups, or are certain segments more affected?

Why it matters: Helps identify if the issue is universal or specific to certain users. Expected answer: The decline is more pronounced among casual users. Impact on approach: We'd investigate factors affecting casual users' engagement specifically.

• Regarding the metric itself, I'm wondering about its components. Has there been any change in how session time is calculated or tracked?

Why it matters: Ensures we're comparing apples to apples in our analysis. Expected answer: No changes in metric calculation. Impact on approach: If confirmed, we can rule out measurement issues and focus on actual usage patterns.

• Considering external factors, I'm thinking about seasonal trends. How does this quarter's performance compare to the same quarter last year?

Why it matters: Helps distinguish between cyclical patterns and new issues. Expected answer: This decline is unusual compared to previous years. Impact on approach: We'd focus on recent changes or new external factors rather than seasonal effects.