Amazon has used three digital engines to reshape and dominate retail:
1. Limitless inventory - Digital enables Amazon to offer an exhaustive selection across many categories without physical space limitations. Starting with books, Amazon has expanded into 16 main categories.
2. Boosting customer care - Digital allows Amazon to optimize the customer experience through real-time metrics, A/B testing, and unlimited inventory.
3. Enabling high margins and low prices - Digital reduces Amazon's variable costs to negligible levels, allowing it to offer low prices while focusing on long-term growth through market share gains.