Dynamic creative (also known as Personalized retargeting), allows an advertiser to display a banner created on-the-fly for a particular consumer based on specific pages that they viewed. For example, if a consumer visits an advertiser's website and browses products A, B and C - they will then be retargeted with a display banner featuring the exact products A, B and C that they previously viewed. This is typically restricted to the visitor's browsing on a single website.
A refined version improves on re-engagement of customers. If a customer begins an online order, for example, but fails to complete, a flag indicates they had interest in the product being ordered. Later, ads showing the product of interest can be custom-linked to point back into the order system. When the user clicks on the ad, they are returned to incomplete order. Such an implementation requires that the order system support deep linking or other retargeting services.