Fool Me Once Facebook – Forbes

This past September Facebook realized it had been making an error in the way it calculated one of the video metrics on its dashboard – the average duration of video viewed. It apologized. Now it is reporting that it has uncovered other bugs that are …
Facebook Increases Transparency By Updating Video and Third-Party Viewability MetricsAdweek
Facebook is making 3 big measurement changes after admitting it accidentally exaggerated more of its metricsBusiness Insider
Facebook Says It Found More Miscalculated MetricsWall Street Journal
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