For more on video engagement read our recent research post analysing 100 million Facebook videos.

The detailed data on all 880 million posts is set out at the end of this post.

Why Is Facebook Engagement Declining?

Our survey data includes engagements for all posts, including those supported by paid promotion. There are a number of possible explanations for this declining level of engagement.

One possible interpretation is that brands and publishers spent less on promotion over the year resulting in less exposure and engagement. However, surveys show the reverse is actually the case with brands and publishers spending more on Facebook promotion. A more likely explanation is that Facebook organic reach has declined significantly and increases in paid promotion have not enabled brands and publishers to maintain their levels of Facebook engagement.

The second explanation is also more likely as Facebook themselves acknowledge that organic reach is declining. They say this is for two main reasons:

More content. Facebook say there are now on average 1,500 stories that could appear in a person’s feed. So competition is increasing and not everything can be shown. Facebook have also been making changes in the algorithm which decides what content to show users. Facebook say they look at thousands of factors to decide which stories to display in an attempt to show users the content that is most relevant. Facebook have also made a number of changes to the feed algorithm, for example to demote lower quality content and clickbait headlines that withhold information from the reader.

A decline in organic reach has also been documented in numerous other articles. For example:

The Financial Times reported a Socialflow survey in June 2016 showing a 42% decline in organic Facebook reach

Marketing Land followed up this story in August 2016 reporting a 52% fall in publisher organic reach on Facebook

In January 2017 Kurt Gessler of the Chicago Tribune reported further decreasing reach, claiming one third of their posts were not being surfaced by the latest Facebook algorithm.

Other potential reasons for declining reach include:

Competition in the news feed. As brands and publishers increase their spending on Facebook advertising and promotion, the more there is competition for space. AdWeek reported that Facebook’s ad revenues in the second quarter to 2017 increased 47% over the same quarter in 2016. This growth in Facebook paid ads will invariably reduce the space for other posts in the news feed. Further changes to the Facebook algorithm which have reduced average reach since January 2017. 2016 was an election year in the US. One possible reason for lower levels of engagement is that the last year’s election drove very high engagement with political posts for publishers. It may be that since the election in 2016, engagement with political posts has declined on Facebook, which has reduced the overall averages.

Our BuzzSumo Data

Facebook Posts Published by Brands and Publishers

We looked at over 880 million Facebook Posts published by brand and publishers over the last year. We looked specifically at image posts, link posts and video posts. The number of posts in each month and category were as follows.