A plain-language explanation
GDN, i.e. Google Display Network, is a network of Google websites, applications and services in which image, text and video ads can be displayed.
Where it helps in practice
The display network reaches people beyond search, but broad reach can become accidental exposure with little value to the brand.
The decision before implementation
Define the campaign role, audiences, app and site exclusions and per-person frequency before launch.
How to verify the result
Review qualified visits, view-through contribution, placements and acquisition cost rather than impressions alone.
