Yahoo initially had no formal strategy, instead focusing on flexibility and letting creative employees launch new products quietly. This emergent approach helped Yahoo create new markets and industries. However, over-reliance on advertising revenues from dot-com companies led to losses when that sector declined. Yahoo realized it needed more diversification and broader revenue streams to reduce dependence on any one industry. The document discusses strategies Yahoo could have used, such as targeting industries less affected by economic swings and promoting country-specific services.