The Google Display Network (GDN) allows advertisers to display banners and text ads on millions of websites. It works by having publishers in the Google AdSense program display ads from advertisers who use Google Ads. Advertisers benefit from GDN by gaining brand awareness, targeting niche audiences, and reaching users across many sites. Advertisers have various creative options for their display ads, including banners, videos, and native ads. Remarketing through GDN allows advertisers to retarget customers who previously visited their website.