Advertising network
An advertising network or ad network is a business that links advertisers with websites or apps that want to show ads. Its primary purpose is to match advertisers with ad publishers to fill ad space.
Ad networks have expanded from primarily TV and print advertising to online advertising. Online networks use a central ad server to send, follow, and measure ads in real time. Compared to older, non-digital media, this allows companies to better target audiences, track performance, and get more detailed reports.