• Programmatic Guaranteed: You and the buyer negotiate a price and terms for inventory that is reserved (guaranteed) for that buyer. Inventory is designated for only that buyer at that price. By converting the proposal this will be a regular order in Google Ad Manager (DFP). 

• Preferred Deal (non-guaranteed): You and the buyer negotiate a price and terms for inventory that buyer can optionally bid upon. The buyer has an initial or "preferred" opportunity to secure the inventory at the negotiated price. However, if the buyer opts out of securing the inventory, the inventory becomes available on the open auction. For more information take a look at the flow charts 1.0 Persona, Processes, and Features. The transaction or campaign is considered "non-guaranteed" because buyers are not obligated to secure the inventory (buyers can opt not to bid) and because the inventory does not explicitly reserve for buyers (you can reserve it in a guaranteed campaign for another buyer).

IMPORTANT: From ADvendio you can only push Programmatic Guaranteed Campaign Items and no Preferred Deals items to Google Ad Manager (DFP). For the import of Delivery Data for Preferred Deals please take a look here: 7.7.1.2 Setup DoubleClick AdExchange.