Video Ad Serving Template (VAST)

The Video Ad Serving Template (VAST) is a 3PAS standard for in-stream video established by IAB, allowing a publisher that supports VAST to play any VAST-compliant ad. In the past, each website had its own video player with its own look and functionality. The VAST standard specifies an XML file capable of holding a variety of resources, including links to video files, companion ads, non-linear banners, and tracking URLs.

For more information on VAST, visit IAB.

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