Adalytics: DoubleVerify, IAS, and Human Security, paid by advertisers to detect bots, regularly miss such traffic; DoubleVerify missed 21% of bot visits (Patience Haggin/Wall Street Journal)

Patience Haggin / Wall Street Journal:
Adalytics: DoubleVerify, IAS, and Human Security, paid by advertisers to detect bots, regularly miss such traffic; DoubleVerify missed 21% of bot visits  —  Companies that claim to help brands avoid serving digital ads to bots regularly miss nonhuman traffic