Mr. Pickles the AdPlugg Pug

Ad Inventory

Ad inventory is the total amount of ad space available on a website. In a retail store, the product inventory is all of the products that are on hand to be sold. Similarly, for a content site, the ad inventory equates to all of the ad slots on the site which can be sold to advertisers. Ad placements and ad zones are a good way to break the sites entire ad inventory into more manageable and sell-able chunks.