From Econsultancy: The main reasons why shoppers abandon their shopping cart.

High shipping costs – 44%

Not ready to purchase – 41%

Price checking – 27%

Price too high – 25%

Wanted to save products for later – 24%

Of course, providing clear delivery charges on product pages and elsewhere so that customers don’t have to add items to the cart to find out total costs would be one improvement, and it also makes sense for retailers to make it as easy as possible for customers to resume their sessions on subsequent visits.