Glossary · Ad metrics
Fill-Rate Optimization
Techniques to raise the share of ad requests that return a paying ad.
What is Fill-Rate Optimization?
Fill-rate optimization covers the levers publishers use to fill more of their ad opportunities — expanding demand sources, improving context signals, and relaxing overly narrow targeting.
For AI apps, richer prompt and session context can improve relevance and therefore demand, lifting fill.
Fill-Rate Optimization in context
To understand Fill-Rate Optimization fully, it helps to know the concepts around it. Fill Rate, the share of ad requests that are answered with a paying ad. Ad Inventory, the total ad space a publisher has available to sell. Programmatic Advertising, automated buying and selling of ad inventory via software.
Together these describe how ad metrics works in practice for an AI app, and where Fill-Rate Optimization fits among them.
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