The document discusses the results of three retargeting campaigns on Facebook Exchange (FBX) across different industries. The first campaign for a retail company found that retargeting shopping cart abandoners on FBX delivered orders at a cost per order of $7.60, below the target of $12. The second campaign for a sports clothing retailer found that while FBX had the lowest cost per mille (CPM), click-through rates were lower than on other ad exchanges. The third campaign for a shopping comparison site targeting specific products achieved a low CPM of $0.83 on FBX but conversion rates were lower than through display retargeting. In conclusion, FBX can deliver low C