What caused the sudden 30% decrease in new user signups for Iterable's mobile push notification feature last week?

Introduction

A sudden 30% decrease in new user signups for Iterable's mobile push notification feature last week is a critical issue that demands immediate attention. This significant drop in a key performance metric could have far-reaching implications for user engagement, revenue, and overall product health. 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 address the issue.

Step 1

Clarifying Questions (3 minutes)

• Looking at the timing, I'm thinking there might have been a recent product update. Has there been any change to the mobile push notification feature or related systems in the past two weeks?

Why it matters: Recent changes often correlate with sudden metric shifts. Expected answer: Yes, there was a minor UI update. Impact on approach: If confirmed, I'd focus on the update's potential impact on user experience and technical performance.

• Considering user segments, I'm curious about the distribution of this decrease. Is the 30% drop uniform across all user segments, or are certain groups more affected?

Why it matters: Identifying specific affected segments can narrow down potential causes. Expected answer: The decrease is more pronounced among new users. Impact on approach: If true, I'd investigate onboarding processes and first-time user experiences.

• Given the specificity of the 30% figure, I'm wondering about our measurement accuracy. Have there been any changes to our analytics systems or how we define and track new user signups?

Why it matters: Ensures we're addressing a real issue, not a measurement anomaly. Expected answer: No changes to analytics or definitions. Impact on approach: If confirmed, I'd focus on external factors and user behavior rather than data integrity issues.

• Considering potential external factors, have there been any significant competitor actions or market changes in the past week that could influence user behavior?

Why it matters: External events can sometimes explain sudden metric changes. Expected answer: No major known competitor actions or market shifts. Impact on approach: If true, I'd focus more on internal factors and user experience issues.