This document provides tips on using Google Display Network (GDN) targeting to reach specific audiences. It discusses the main types of GDN targeting including topical, keyword, placement, audience, in-market, affinity, and remarketing targeting. It emphasizes layering different targeting types like custom affinities and time-based targeting to precisely find audiences like vegan dessert buyers. Additional advice includes optimizing remarketing campaigns, creating specific remarketing audiences, and using dynamic remarketing with product feeds. The key is to determine where, who, and what your target audience is to test effectively on GDN.