Glossary/Adtech & Programmatic/Ad Server
Adtech & Programmatic
Ad Server
Technology that stores, delivers, and tracks ads across sites and apps.
By Brandon Mina·CEO, BrandPilot AI·Updated November 2026
Appears in Lesson 1 of Programmatic 101
Short answer
An ad server is technology that stores ad creatives, decides which ad to show in each slot, delivers it, and records impressions, clicks, and other events. Publishers use ad servers to prioritize direct deals and programmatic demand. Advertisers use their own ad servers to centralize tracking and measurement across many sites and apps.