The document discusses how to use remarketing tactics to retain customers. It recommends building audiences from website visitors and previous customers using tools like Google Adwords and Analytics. Remarketing lists can be used to re-engage abandoned cart visitors or those who visited product pages but didn't convert. Proper remarketing involves testing relevant ad formats and strategies, such as bidding more for lists with higher conversion rates. While remarketing can boost brands and conversions over time, frequent ad displays should be limited to avoid annoyance.