GDN (Google Display Network)

GDN, the Google Display Network, is a vast network of millions of partner websites, mobile apps and Google-owned services such as YouTube and Gmail. Within it, advertisers run display ads — image banners, text ads, rich media and video — reaching audiences while they browse content rather than only when they search.

How GDN works

Display campaigns are managed in Google Ads, where you choose formats, budget and targeting. The system matches ads to placements using several methods:

• Contextual targeting — ads appear on pages whose topic matches your keywords or categories;
• Audiences — targeting by interests, demographics and purchase intent;
• Remarketing — reaching people who previously visited the advertiser's site;
• Managed placements — manually selecting specific sites, channels or apps.

Billing is usually based on CPC (cost per click) or CPM (cost per thousand impressions). Creatives can be uploaded manually or generated as responsive display ads that automatically adjust their size to fit each placement.

Practical application

GDN excels at building reach and brand awareness, at product campaigns with strong visual appeal, and at remarketing that reminds users of abandoned carts. Thanks to its enormous ad inventory, it can reach a broad audience at a relatively low cost per impression.

In practice, marketers combine GDN with Search campaigns: display creates the first brand touchpoint and nurtures interest, while search ads close the conversion once the user is ready to buy. The key to efficiency is carefully excluding irrelevant placements and reviewing performance reports regularly, so the budget does not leak onto random low-quality sites.