What is the cookie window?

The cookie window is 24 hours.

You earn commission income on any qualifying items placed in a customer's Shopping Cart within 24 hours of their arrival at Amazon.com via your link. However, this 24-hour window closes once the customer submits their order or re-enters Amazon.com through another link.

Once the window is closed, you will not earn commission income on any subsequent purchases. However, if the customer then returns to Amazon.com through one of your links, this opens a new 24-hour window.

It is of course possible that a customer may arrive at Amazon.com via your link, add an item to their Shopping Cart, and then leave Amazon.com without placing an order. As long as the item was added to the customer's Shopping Cart during this 24-hour window, you will still earn a commission if the order is placed before the Shopping Cart expires (usually after 90 days). The commission will not be credited to your account until the customer has purchased the item, accepted delivery, and remitted full payment to Amazon.com.