A VAST ad tag URL is used by a player to retrieve video and audio ads.
Example of a VAST ad tag URL
A sample VAST ad tag URL, with parameters and assigned values would look something like this:
https://securepubads.g.doubleclick.net/gampad/ads?env=vp&gdfp_req=1&output=vast&iu=/1234/video-demo&sz=400x300&unviewed_position_start=1&ciu_szs=728x90,300x250
Generate video and audio ad tags
You can create a VAST ad tag URL in one of two ways:
- In Google Ad Manager: Generate video and audio ad tags from your ad units
- Manually: Assemble or modify URL using guidance from VAST ad tag parameters
General requirements and information about the URL
- Protocol: VAST ad tags support both http and https. Impression tracking URLs respect the current SSL setting and return as either http or https. Click-through and click-tracking use http since they redirect from another page.
- Domain: The use of dynamic domains, created via the pattern match macro or any other dynamic method, is not allowed and will result in an error.
- Live traffic: Ad tag URLs for live stream video mustcontain
/livein their path to ensure the ability to handle heavy traffic volumes, where all ad breaks are delivered at the same time.
Learn more
- See a list of all VAST ad tag URL parameters
- See required and recommended parameter lists by implementation type
