Facebook admits it’s still ‘not 100% there’ on measurement

Facebook has come under fire over the past year after finding a number of measurement errors across a range of its products. For example, last September the social network revealed it had overstated how long users watch timeline videos by up to 80%, while in May it was revealed that a measurement error connected with its video carousel ads was actually costing advertisers money.
And speaking at the IAB’s Digital Upfronts event today (2 October), Facebook’s head of UK comms planning I