The amount of time that a shopping cart persists in your online store depends on whether the customer is logged in or shopping as a guest:

• Logged in: the customer has 2 weeks to complete their order and purchase the items they've added to the shopping cart. After that period, the cart is emptied.
• Guest: shopping cart contents are saved for the duration of the session. A session ends 30 minutes after the last activity in your online store.