Advertisers: Facebook Hid Info of Ad Stats., Inflated Watch-Times

Facebook struggles against advertisers who allege that Facebook knew for more than a year about problems measuring viewership of video ads before disclosing the issue. (AP photo/Marcio Jose Sanchez)

The Wall Street Journal

Facebook Inc. knew of problems in how it measured viewership of video ads on its platform for more than a year before it disclosed them in 2016, according to a complaint filed Tuesday by advertisers.

A group of small advertisers filed a lawsuit in California federal court in 2016, alleging the tech giant engaged in unfair business conduct by disseminating inaccurate metrics that significantly overestimated the amount of time users were spending watching video ads.

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