Inventory and fill
Impression
also called Ad impressionDefinition
One instance of an ad being served to a user. The basic unit of inventory.
Why it matters if you sell your own ads
Impressions are what you are selling and what your plan is priced against. Worth knowing whether a platform counts served impressions or ad requests, because the two differ and only one of them is inventory you can actually sell.
Related terms
Put a floor price on your own inventory
Your advertisers sign up on your own branded portal, fund an account and bid above your floor. You keep one hundred percent, and your existing ads stay on as the fallback.
Start free trial14 days free. Your existing ads keep running. Cancel anytime.