Glossary · Advertising
Ad Inventory
The total ad space a publisher has available to sell.
What is Ad Inventory?
Ad inventory is the sum of ad opportunities a publisher can offer advertisers. For an AI app, inventory is the set of ad-eligible turns across all sessions.
How much of your inventory earns revenue depends on fill rate and demand.
Ad Inventory in context
To understand Ad Inventory fully, it helps to know the concepts around it. Fill Rate, the share of ad requests that are answered with a paying ad. Ad Slot, a specific place where a single ad can appear. Direct-Sold Ads, ad placements sold directly to advertisers rather than via a network. House Ads, a publisher's own promotions used to fill unsold inventory.
Together these describe how advertising works in practice for an AI app, and where Ad Inventory fits among them.
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