Users

The firm said sales growth could be just 3 percent in the first three months of 2022, far below its historic pace.

Profits have already been hit as the firm ploughs money into projects focused on virtual reality.

The update sent shares down 20 percent in after-hours trade.

The sell-off spread to similar companies, like Snap, which also saw its shares plunge.

Analysts had been expecting Meta to report strong numbers, after Google-owner Alphabet shared its results yesterday.

The social network has been under intense scrutiny in recent years for how its algorithms promote content.

Now, it says it is testing controls to "adjust people's ranking preferences" and customise the feed.

That includes, for example, increasing the number of posts from friends and family, and decreasing those from groups and pages.

It will also make controls that already exist "easier to access", it said - such as the favourites and snooze features, which largely live inside a settings sub-menu.

The social media platform, which has often faced criticism over abusive user behaviour, tested the feature last year.

Twitter said the tests showed that the prompts reduced offensive replies.

On Wednesday, the company said it would roll the prompts out to English language accounts using Twitter on Apple and Android.

In a blog post, Twitter said they had found that prompts led 34% of people to revise their initial reply or to decide against sending their reply at all.

Previously the board only heard appeals from users about content they felt had been unfairly removed - or referrals which came from Facebook itself.

The board has the power to overrule Facebook's original content decisions.

Its 20 members include former Danish Prime Minister Helle Thorning-Schmidt and ex-Guardian editor Alan Rusbridger.

Anyone can submit content to the board for re-review, providing it has been reported to Facebook in the first instance.