Ad Inventory
Ad inventory is the advertising space a publisher has to sell, counted in impressions across its pages and products.
Why It Matters
Inventory is perishable: unsold impressions cannot be stored, which is why pricing and fill rates matter more than volume alone.
Related Terms
- CPMCPM is the price of advertising per thousand impressions.
- SSPA supply-side platform is the software publishers use to offer their advertising space to buyers and manage how it is sold.
- Programmatic AdvertisingProgrammatic advertising is the automated buying and selling of advertising space, with each impression auctioned in the moment a page loads.
- Media EconomicsMedia economics is the study of how media businesses make money: the cost of production, the value of attention, and the terms on which distribution is obtained.
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