When is a customer removed from a dynamic remarketing list?

A customer is removed from a dynamic remarketing list when they purchase the product. This is because the primary goal of dynamic remarketing is to re-engage users who have shown interest in a product but haven't completed a purchase. Once a purchase is made, the customer has converted, and continued remarketing for that specific product becomes redundant and potentially annoying. The other options (searching for, viewing, or adding to cart) are all actions that indicate interest but not conversion, making them ideal triggers for adding a customer to a remarketing list, not removing them.