E-commerce is at an all-time high, and at the heart of it stands a colossus: Amazon. What began as an online bookstore has transformed into a holistic marketplace, a go-to destination for anything from books to electronics, clothing to groceries. But have you ever wondered how the items on your screen appear to be aware of your particular needs? How do your searches, desires, and preferences seem to be predicted with unnerving accuracy? The answer lies in the art and science of Amazon advertising.