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IVT Metrics show the amount of "invalid" traffic coming through your account measured by different vendors. These metrics are extremely useful for creating blacklists blocklists to block domains with a high frequency of "invalid" traffic.
Even with Pre-Bid IVT Blocking enabled on a supply tag, we highly recommended utilizing post-impression detection along with tag health flags. Pre-Bid IVT blocking takes place at the request level, and is not guaranteed to detect and block all IVT at that stage. Post-Imp IVT data is collected and analyzed at the impression level, and thus will be able to catch IVT traffic that other detection methods will not.
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If your tag has a high bot/IVT rate, run a new report with the time range set to Custom spanning 2-3 days, and add the dimension 'Declared Domain' for Desktop and Mobile web, and App Bundle or app name for In-app and CTV campaigns. You could then narrow down the results of the sources with high IVT rates and add them to new or existing blacklistsblocklists. This can be a blacklist blocklist for the tag specifically, for a supply partner, or a master blacklist blocklist for all of your tags, whatever your preference is. Make sure the blacklist blocklist is implemented in the tag's targeting.
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