Glossary
What is Google Ad Manager?
Also called: GAM, Ad Manager, Google Ad Manager 360, DFP
Google Ad Manager is Google's ad server for publishers: it decides which line item, deal or auction bid fills each ad slot, and it includes Ad Exchange.
हिंदी में पढ़ेंGoogle Ad Manager is an ad server. Your pages request ads through the Google Publisher Tag, and Ad Manager checks every source that could fill the slot against your rules: direct campaigns booked as line items, programmatic deals, header bidding line items and Google’s own exchange, Ad Exchange (AdX). It bundles the ad server and an exchange in one product.
Line items compete by priority, and the lower number wins first. Sponsorship is 4, Standard is 6, 8 or 10, and Price priority, Network, Bulk, AdSense and Ad Exchange sit at 12, where price decides; House is 16. Through dynamic allocation, AdX can still compete with guaranteed line items. Pricing rules set floors, and since December 2025 they can set floors for specific bidders.
Google says AdSense fits best for sites without direct sales, while Ad Manager is built for publishers who sell direct or manage several demand partners. Many smaller sites reach AdX through a Google partner using Multiple Customer Management. Ad Manager 360 adds features such as header bidding trafficking for Prebid web banners.
Example
Acme Shoes buys 500,000 homepage impressions at a $6 CPM: 500,000 × $6 ÷ 1,000 = $3,000. In Ad Manager that is one order holding a Standard line item with the dates, goal, rate and targeting, plus the creatives. Impressions it does not need go to priority 12 demand, where AdX and header bidding line items compete on price.
Why it matters to publishers
The ad server decides who gets each impression, so its set-up shapes your revenue more than any single partner. Priorities and floors are the core of ad ops.