Google has tied up with more than 2 million websites globally, covering over 90% of the internet audience globally. Along with serving your display and video Ads on Google Feeds, Google gives you access to this network- Google Display Network (GDN). Targeting is based on interest in three groups- • Affinity Audiences- groups created based on common hobbies, interests, pastimes. • Custom Affinity Audiences- focus custom groups narrowed down by keywords. • In- Market Audiences- groups of people actively looking for products and services like yours. GDN also allows you to target audiences based on Demographics like age, gender, parental status, household income. The key difference between Google Search Network and Google Display Network is where the Ads are served. Search network covers Google Search feeds and on partner networks (Ask.com, Lycos.com, results and product pages on Target, Walmart and Amazon). Whereas, for GDN Ads are served up when people visit other websites and Apps. You can find a directory of Google Premier Partners here