bii historical average abandonment rateBI Intelligence
Shopping cart abandonment — when shoppers put items in their online shopping carts, but then leave before completing the purchase — is the bane of the online retail industry.
But it's also a huge opportunity: Approximately $4 trillion worth of merchandise will be abandoned in online shopping carts this year, and about 63% of that is potentially recoverable by savvy online retailers, according to BI Intelligence estimates. 

Here are some key points from the report: