You're a PM at Instagram responsible for building the Reels feature. How would you define and measure its success?

Success for Instagram Reels would be defined by achieving key strategic objectives, such as increasing user engagement and retention, and ultimately driving revenue growth.

To measure this, I would focus on the following key metrics:

• Time Spent: An increase in average time spent per user on the platform, indicating users are finding value and spending more time engaging with content, including Reels.
• Reels Consumption: Metrics like daily/monthly active Reels viewers, average Reels watched per user, and completion rates for Reels to understand adoption and engagement with the feature itself.
• Content Creation: Number of Reels created per day/week, number of creators actively posting, and the diversity of content being produced.
• User Retention: Cohort analysis to see if users who engage with Reels have higher retention rates compared to those who don't.
• Monetization: Revenue generated directly from Reels ads, and the impact on overall ad revenue through increased inventory and user attention.

These metrics, tracked over time and segmented by user groups, would provide a comprehensive view of Reels' impact on user behavior and business goals.