Overall reach on Facebook is down for publishers.

Over the past few months, publishers may have noticed that their overall reach on Facebook has dramatically declined.

According to SocialFlow, publishers have seen an overall decline per post of 42% from January to May 2016.

This may be due to a change in Facebook's algorithm, which aims to give more prominence to personal posts.

It could also be that the algorithm has been edited to show users a limited number of posts from any given publisher, to prevent 'spamming' on a users newsfeed.

Facebook has not revealed a reason for the decline as of yet.