An overlay ad is an overlay-player widget that is placed over a video player. It is a fully customizable overlay player that will show video ads (VAST/VPAID) prior to the video content. Clicking on the overlay usually takes the users to a landing page assigned by the advertiser. Users can close an overlay ad by clicking on the “x” button in the top-right corner or skip the ad if you choose so in your settings.
Impression
Impression indicates the number of times the particular ads have shown up on a site during the users’ visit. Basically, the ads are usually displayed