When it comes to online shopping, there’s an epidemic of abandoned carts. Some studies have found that about 70% of carts get abandoned across all devices, but the type of device does make a difference. For example, the rate is 85% on smartphones and just over 80% on tablets. But one thing that is consistent across all devices is that the majority of people who put items into their online shopping cart will never buy those items. They will simply walk away without completing the purchase.