In PrestaShop, you can check abandoned carts and customers by using the built-in “Abandoned Cart” feature. This feature allows you to view a list of customers who have added items to their cart but have not completed the checkout process. You can also view information such as the date and time the cart was abandoned, the customer’s email address, and the items in the cart. Additionally, you can use the “Customers” feature to view a list of all of your customers and their information, including their purchase history and contact details. This feature can be accessed from the “Customers” menu in the back office of your PrestaShop site.