The document discusses optimization of ads in the Zedo interface. It defines ad optimization as serving ads that perform better, such as generating more revenue, clicks, or conversions, more often to increase ROI. It explains that ads can be optimized based on revenue, clicks, click-through rate, or conversion rate. The document also outlines the steps for doing optimization in the Zedo interface, which includes selecting a report type, delivery type, and ranking ads. The conclusion states that ad optimization improves performance by increasing impressions for lower performing ads.