This document discusses how advanced retargeting can help inbound marketers by increasing reach, speed, and conversions. It explains how segmentation of an audience pool can help prioritize retargeting efforts. Retargeting visitors who leave a website on other popular websites can decrease costs per acquisition by 40% when combined with inbound marketing and real-time bidding. Segmentation both on and off the website based on data, domains, geography, and qualifications can allow for focused retargeting approaches.