To test a tag please visit following URL https://tag.bidsopt.com
Test A Tag is a service designed to preview ad tags/creatives on the fly and on various browsers directly. It supports both HTML tags for banner creatives and VAST tags for video, relying on Google’s IMA SDK for the latter. The service was designed to make previewing a creative a little easier for ad ops and clients alike.
Utmost care has been taken to ensure that a creative shows up as it was intended to. However, due to the many adservers, measurement, ad verification and blocking services intermediaries, the actual creative corresponding to a tag may appear different when tested on different domains or devices. Specifically, but not necessarily for all creatives, the domain tag.bidsopt.com may need to be whitelisted on services that block ads based on domains.