Airbnb: Nights booked
Nights booked reflects transactions received and Airbnb’s core purpose of connecting travelers with places to stay, creating value for both guests and hosts. However, teams could increase bookings through deep discounts or misleading listings without improving the overall experience. More bookings would mean little if guests were dissatisfied or lost trust in the platform. Pairing this metric with repeat bookings and guest satisfaction would give a more complete picture.
Facebook: 7 friends in 10 days
Adding seven friends within ten days suggests that new users want to connect with others, rather than simply download the app and forget about it. These connections can give people a reason to keep coming back. However, encouraging contact imports or constantly suggesting new friends could inflate the number without creating meaningful relationships that keep users coming back to the app. Looking at whether users regularly interact with their connections after connecting would be more revealing about their engagement.
Slack: 2,000 messages
Sending 2,000 messages suggests that a team has incorporated Slack into its daily workflow. But more messages don’t necessarily mean better collaboration. Teams could send unnecessary updates or generate bot messages just to reach the target. This could overwhelm users with notifications and even push them toward other ways of communicating off of the platform itself.
The lesson I think is that one metric can’t capture the whole story. Goodhart’s Law describes what happens when a measure becomes a target as people start optimizing for the number rather than the outcome it was supposed to represent. Metrics are valuable, but they need to be considered alongside qualitative feedback and other indicators to understand whether a product is genuinely serving its users and will therefore be successful.
