Amazon Prime Day started just five years ago, but is already a record-breaking sales event for the ecommerce platform. This year, Amazon sold more than 175 million products worth $7.16 billion on Prime Day, up 71% from 100 million products worth $4.19 billion in 2018. Dubbed “Black Friday in July,” Prime Day is the third-largest shopping event in the U.S. after Cyber Monday and Black Friday. It is also credited with reshaping back to school shopping patterns, as many consumers now start their shopping in July during the event. In fact, 84% of retailers say that Prime week is the most important time for driving online sales during the entire back-to-school shopping season.