Estimated read time: Less than a minute
This archived news story is available only for your personal, non-commercial use. Information in the story may be outdated or superseded by additional information. Reading or replaying the story in its archived form does not constitute a republication of the story.
NEW YORK (AP) — Facebook says it will work with independent companies like Nielsen and comScore to review more of its metrics after it uncovered new problems with the data it provides to advertisers and publishers that use its network.
Facebook had apologized to advertisers in September for errors that led to overstating how long users watched videos.
On Wednesday, the Menlo Park, California, company said in a post that it miscalculated four metrics, including undercounting how many people watched all of a video and overcounting how much time people spent reading "Instant Articles," which loads stories from publishers like The New York Times and Washington Post more quickly on Facebook.
Facebook and Google together account for the majority of digital ad dollars spent in the U.S.
Copyright © The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.