Ad Pod
A sequence of multiple advertisements delivered within one commercial break, similar to a television ad break.
ADTECH REFERENCE
VAST & OTT Advertising Glossary
A practical reference for publishers, OTT platforms, streaming products and teams implementing video advertising technology.
Ad Server
Technology used to select, deliver, track and report advertisements.
Ad Tag
A URL or code reference used by a player or advertising system to request an advertisement or ad response.
AVOD
Advertising-based video on demand. Viewers access content while advertising contributes to monetization.
CSAI
Client-Side Ad Insertion. The application or video player requests and inserts advertisements on the viewer device.
CTV
Connected TV. Internet-connected televisions or television devices used to stream digital video content.
Completion
A tracking event indicating that the advertisement reached the end of playback.
Clickthrough
The destination URL associated with an advertisement when a viewer chooses to interact with it.
Error Tracking
A mechanism for reporting failures during ad request, media loading or playback.
First Quartile
A tracking event indicating approximately 25 percent of the advertisement has played.
Impression
A recorded advertising event indicating that an ad opportunity or ad display met the implementation criteria used by the advertising system.
Linear Ad
A video advertisement that plays in the main video stream before, during or after content.
Mid-Roll
A video advertisement or ad break that occurs during the main content.
Non-Linear Ad
An advertisement displayed alongside or over video content without replacing the primary video stream.
OTT
Over-the-top video delivery: streaming video distributed over the internet rather than through a traditional broadcast or cable delivery path.
Post-Roll
An advertisement played after the main content ends.
Pre-Roll
An advertisement played before the main content begins.
Redirect
A VAST response that points the player or ad system to another VAST URL, allowing multiple advertising systems to participate in delivery.
SSAI
Server-Side Ad Insertion. Advertising and content are assembled or stitched on the server side before delivery to the viewer.
Skippable Ad
An advertisement that permits the viewer to skip after specified conditions are met.
Start Event
A tracking event recorded when advertisement playback begins.
Third Quartile
A tracking event indicating approximately 75 percent of the advertisement has played.
VAST
Video Ad Serving Template. An IAB specification used to describe video advertisements, media files, tracking events, clicks, errors and related ad-serving information.
VAST Wrapper
A VAST response that redirects to another VAST response rather than directly providing the final media creative.
Video Quartiles
Standard playback progress milestones commonly measured at 25, 50, 75 and 100 percent of an advertisement.
Viewability
Measurement intended to determine whether an advertisement had an opportunity to be seen under defined criteria.
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