HOW TO FIND YOUR "ONE METRIC TO RULE THEM ALL"

Summary from the TLDR Founders newsletter

The founder of HotelTonight tracked 80 metrics at his first two startups. Both failed. At HotelTonight, he picked one - total transactions - and it worked. Slack found that teams sending 2,000+ messages had 93% retention. Airbnb zeroed in on nights booked. WhatsApp only tracked MAU.