What criteria could not be used to create a Dynamic Remarketing audience?

Dynamic Remarketing in Google Analytics relies on user behavior data collected through the Analytics tracking code, specifically page views and events. Google Analytics can track when a user views a homepage, a search result page, or product-detail pages, as these actions involve page loads or specific events that can be configured. However, Google Analytics does not inherently track product returns. This information typically resides in an e-commerce platform's backend system and is not automatically sent to Google Analytics as a standard event or page view. While it's possible to send custom data about returns to Analytics, it's not a standard criterion available for out-of-the-box Dynamic Remarketing audience creation.