"The idea was to create a version of Facebook with two different News Feeds: one as a dedicated place with posts from friends and family and another as a dedicated place for posts from Pages", he said.
After the test was first announced in October, it drew major criticism from publishers in those test countries - Slovakia, Sri Lanka, Serbia, Bolivia, Guatemala and Cambodia.
He said Facebook would, in response, revise how it tests product changes although he did not say how.
Facebook's Head of News Feed Adam Mosseri said in a blog post that the "explore feed" feature was going the way of MySpace instead of going global because people did not want it. Today, we're ending one of those tests: the Explore Feed.
These moves are separate to the global changes made to the News Feed in January that similarly look to reduce public content and promote "meaningful social interactions".
The company had trialled a new design that split the feed into two.
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MPs and officials in the U.S. have questioned the site, along with other internet giants such as Google and Twitter, over their policing of such content as well as the use of their platforms to create political discourse.
Facebook routinely makes changes to its News Feed to show users more (or less) of specific types of content, like live video.
Fortunately, it would seem that most Facebook users happen to like seeing news updates in their feeds as well; and the company has reverted these countries to the same posts that the rest of the world sees.
KitGuru Says: While the KitGuru Facebook page is "verified", we find that many of our posts will go out to less than 1% of our followers at times, which can be frustrating, as it means many of our readers often miss important posts.
Struhárik said news media websites are stronger now by not relying on Facebook for traffic, and he expects traffic from Facebook to fall further in the long term because of other changes to the News Feed that deemphasize media overall. "Both of these tests provided us with valuable feedback that we will use to improve News Feed for everyone".
In October, Facebook rolled out its "Explore Feed" to help users discover content from outside their standard feed.