Programmatic & Buying

Fill Rate

The share of available ad slots actually sold and playing paid creative. Low fill rate means empty or house-ad inventory and lost revenue.

Also known as: sell-through rate

Related terms

Ad Inventory The advertising space a network has available to sell — typically expressed as ad slots within a loop across a set of screens over time. Floor Price The minimum CPM a media owner will accept for an impression in a programmatic auction. Bids below the floor are rejected.