What caused the sudden 50% decrease in new property listings on Zoopla's mobile app last week?

Introduction

The sudden 50% decrease in new property listings on Zoopla's mobile app last week is a critical issue that demands immediate attention. This significant drop could have far-reaching consequences for Zoopla's business model, user engagement, and market position. I'll approach this problem systematically, focusing on identifying the root cause, validating hypotheses, and developing both short-term fixes and long-term strategies to prevent future occurrences.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking this could be a recent app update issue. Has there been any significant app update or feature release in the past week?

Why it matters: Recent changes often correlate with sudden metric shifts. Expected answer: Yes, there was an update. Impact on approach: If yes, we'd focus on the update's impact; if no, we'd look at other factors.

• Considering user segments, I'm wondering if this decrease is uniform across all user types. Are we seeing this 50% drop consistently across different user segments (e.g., individual sellers, estate agents)?

Why it matters: Helps identify if the issue is global or specific to certain user groups. Expected answer: The drop is more pronounced in individual sellers. Impact on approach: If segmented, we'd focus on the most affected group; if uniform, we'd look at system-wide issues.

• Given the magnitude of the drop, I'm curious about any changes in the competitive landscape. Have any major competitors launched new features or marketing campaigns recently?

Why it matters: External factors could be drawing users away from Zoopla. Expected answer: No significant competitor actions noted. Impact on approach: If yes, we'd consider market positioning; if no, we'd focus more on internal factors.

• Considering potential data issues, I'm wondering about the reliability of our tracking systems. Have there been any changes to how we measure or define "new property listings" in the past month?

Why it matters: Ensures we're not chasing a phantom problem due to measurement errors. Expected answer: No changes to measurement systems. Impact on approach: If yes, we'd audit our data collection; if no, we'd focus on actual listing decrease causes.