Facebook wants to split its News Feed into two. What metrics would you evaluate to validate this decision?

To evaluate splitting Facebook's News Feed, I would focus on metrics that measure user engagement, satisfaction, and the overall health of the platform. Key metrics would include:

• Engagement Metrics: Time spent in each feed, scroll depth, click-through rates on posts, likes, comments, shares, and video watch time. A successful split should ideally maintain or increase these across both feeds.
• User Satisfaction: Net Promoter Score (NPS), user surveys, and qualitative feedback specifically asking about the new feed structure and its impact on their experience.
• Content Consumption: The diversity of content consumed in each feed. Are users finding relevant content in both? Are there unintended consequences like users abandoning one feed entirely?
• Retention and Churn: Whether the change impacts daily/monthly active users and if users are leaving the platform due to the new structure.
• Monetization Metrics: For the business side, ad click-through rates, conversion rates, and overall ad revenue would be crucial to ensure the split doesn't negatively impact business goals.

I would also consider A/B testing the split with a subset of users to compare these metrics against a control group using the current News Feed before a full rollout.