GLOSSARY Viewability 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 Metric that determines if an ad was actually viewable on screen by the user. 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)