Video Ad Serving Template (VAST) is a template defined by the IAB to standardize the delivery of video ads, which are played on a publisher's player, across sites.
In Amazon Ad Server (AAS), VAST is known as an in-stream Video. It can be served before (pre-roll), during (mid-roll), or after (post-roll) video content. VAST can contain linear elements and/or companion ads in a variety of combinations.
AAS supports VAST up to version 4.1.
Note
Notes:
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If your in-stream ad includes interactive elements, see About in-stream video interactive.
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If you are building an in-stream audio, make sure that your publisher or network does not require a DAAST tag instead of a VAST. For more information, see About in-stream audio.
Since this format is a simple video file, VAST does not require any template. To build the ad, upload the video file and set up your ad in AAS.
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Set Up |
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Share |
Share your ad with your media agency. |
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Specifications |
Dimensions |
Any |
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Maximum duration |
None |
The publisher or the media technology (for example, DSP) determine the maximum duration. IAB recommendation: 30 seconds. |
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Maximum size |
1 GB This is a theoretical limit. Try to optimize the file size to be as lightweight as possible. |
While AAS In-Stream ads support a wide range of file formats and can be up to 1GB, ads must also follow the specifications of the publishers or DSPs that will ultimately run the ad. |
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Tag type |
In-Stream |
For more information, see Amazon Ad Server ad formats. |
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Compatibility |
Device |
Any |
Examples include web, mobile web, in-app. |
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Dynamic creative |
Supported |
For more information, see Introduction to dynamic creative. |
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Publisher Certification |
Web |
Not required |
For more information, see About publisher certifications. |
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In-app |
Not required |
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Programmatic |
Recommended |
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Measurements |
Available metrics |
Examples include:
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For more information about metrics, see Glossary: dimensions and metrics for Aggregated Reportssa. NoteNote: In some cases, impressions and interactions following ad requests can happen at a later time (for example, when creatives are pre-fetched during a video stream). |
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