The document discusses effective retargeting which uses cookies to place advertising messages in front of consumers who have shown interest in a brand or product by visiting a website in order to convert the 98% of online shoppers who do not make a purchase on their first visit. It explains how retargeting works via cookies and how to set up remarketing campaigns in Google Adwords. The document also provides examples of creative retargeting strategies using social media, link building, videos, and search retargeting as well as solutions for potential problems with retargeting frequency.