GLOSSARY Viewability Rate A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Percentage of ad impressions meeting minimum viewability criteria. Back to index Related concepts VAST (Video Ad Serving Template)vCPM (Viewable Cost Per Mille)VendorVideo Ad Completion RateVideo AdvertisingVideo Completion Rate (VCR)Video Multiple Ad Playlist (VMAP)Video on Demand (VOD)