Invalid traffic (IVT)

Invalid traffic is any impression, click, or conversion counted by ad-measurement systems that did not come from genuine human interest in the ad. The industry standard, set by the Media Rating Council, splits it into general invalid traffic, filterable using known lists of bots and crawlers, and sophisticated invalid traffic, which mimics human behavior closely enough that it requires pattern analysis or browser fingerprinting-based detection to catch.

Invalid traffic differs from low-quality but real traffic, such as a genuine visitor who is simply a bad fit for the offer: invalid traffic is not human engagement at all, whether generated automatically by bots and scripts or by click farms paid to interact with ads. It corrupts every metric downstream of it, inflating impression counts, distorting cost per click efficiency, and in the worst cases producing fake conversions tied to a fabricated Click ID.

Invalid traffic matters because advertisers pay for it as if it were real, and because it silently skews every other metric used to judge a campaign, from ad viewability to conversion rate. Most ad platforms and third-party verification vendors filter and credit back detected invalid traffic, but detection is never complete, so measured invalid traffic rates should be read as a floor rather than a precise figure.