Checkout conversion rate is an ecommerce metric that refers to the percentage of shoppers who begin the checkout process, then complete it, over a given period of time. This differs from checkout abandonment rate and shopping cart abandonment rate, which each calculate the percentage of customers who do not complete a purchase. By monitoring their checkout page conversion rates over time, an online store can monitor for patterns and inconsistencies. In this way, they can gain a deeper understanding about what aspects of the checkout process are resonating with their customers and which might be worth optimizing.