Amazon’s Prime Day sale is longer than ever — and even more important than usual for the company. Here’s why. - MarketWatch

1. Amazon's Prime Day extended to July 8-11, boosting competitive edge. 2. Analysts predict $21.4 billion in sales, a 60% increase year-over-year. 3. Competition from rivals makes customer experience crucial for success. 4. Tariffs may push shoppers to stock up earlier during Prime Day. 5. Concerns grow over worker conditions and marketing AI's reliability.