According to former team members interviewed by Gizmodo, this small group has the power to choose what stories make it onto the trending bar and, more importantly, what news sites each topic links out to. “We choose what’s trending,” said one. “There was no real standard for measuring what qualified as news and what didn’t. It was up to the news curator to decide.”…

The news curation team writes headlines for each of the topics, along with a three-sentence summary of the news story it’s pegged to, and choose an image or Facebook video to attach to the topic. The news curator also chooses the “most substantive post” to summarize the topic, usually from a news website. The former contractors Gizmodo interviewed said they were asked to write neutral headlines, and encouraged to promote a video only if it had been uploaded to Facebook. They were also told to select articles from a list of preferred media outlets that included sites like the New York Times, Time, Variety, and other traditional outlets. They would regularly avoid sites like World Star Hip Hop, The Blaze, and Breitbart, but were never explicitly told to suppress those outlets. They were also discouraged from mentioning Twitter by name in headlines and summaries, and instead asked to refer to social media in a broader context.

News curators also have the power to “deactivate” (or blacklist) a trending topic—a power that those we spoke to exercised on a daily basis. A topic was often blacklisted if it didn’t have at least three traditional news sources covering it, but otherwise the protocol was murky—meaning a curator could ostensibly blacklist a topic without a particularly good reason for doing so. (Those we interviewed said they didn’t see any signs that blacklisting was being abused or used inappropriately.)