In assessing the decision to divide Facebook's News Feed into two, I would consider several key metrics. First, engagement metrics such as likes, shares, comments, and the amount of time users spend on each News Feed are essential. These metrics would reveal whether users are responding positively to the modifications. Next, I would examine user acquisition and retention metrics . Are we observing an increase in new user registrations, and are existing users staying on the platform longer or reducing their session times? These insights can reflect the overall level of user satisfaction. Additionally, for advertisers, who are vital for Facebook's revenue, I would track the effectiveness of ads . This encompasses click-through rates, cost per click, and total ad revenue. If our changes lead to advertisers receiving less value from their ads, it could adversely impact Facebook's profitability. Finally, I would analyze customer service data . A rise in complaints or inquiries regarding the new News Feed might indicate resistance to the new system and suggest that additional changes or clearer communication are needed to enhance the user experience.