The ideal length of Facebook posts is 40 characters — at least according to all the “experts”.
But, there is a problem with this conclusion: no data backs this up.
At the Social Media Lab, we researched more on this subject, only to find references to data from 2012 and 2016.
Old data such as this is not valid in 2019’s ever-changing social media marketing landscape.
Due to the lack of recent, measurable data, the Social Media Lab needed to research Facebook post lengths.
Our hypothesis is purely based on what many of today’s social media “experts” have claimed.
Hypothesis: Shorter Facebook posts will have higher Reach and engagement.
Three well-established and diverse Facebook pages were used for this experiment:
For our test we defined short posts as under 140 characters; long posts were over 140 characters—but no character max.
20 posts of each length were made to each page (1 day at a time) alternating between day and night, such as the schedule below for Space Walk:
We used the Agorapulse app to schedule all posts to every page.
Below are some examples of the short posts for each page:
This is what the long posts looked like:
The experiment ran for 20 days.
To properly evaluate the impact of post length on Facebook, we’ll
at 4 different data sets:
Looking at the insights of each parameter will give us a clear, and true picture of performance based on post length.
The numbers below will be the combined average of all 3 pages. To see the data from each page, click the image at the bottom of this experiment.
Short posts achieved 34.57% higher Reach.
Clicks were 82.33% higher on short posts.
Data shows short posts had 91.39% more Likes.
Comments were 50% higher on short posts.
Every stat weighed heavily in favor of short posts on Facebook.
The percentage differences between short posts and long posts are staggering, but are they statistically significant?
Our statistical significance calculator lets us know if we were to run this test again (or if you were to run it) would we see the same results? To reach statistical significance you must achieve 95% certainty.
We compared Reach to the number of Likes produced, and it is 100% statistically significant!
The same results occur when we compare Reach to Clicks.
Based on these results the Social Media Lab concludes that short posts on Facebook outperform long posts and they should be your focus when you craft content.
Attention spans are short due to the mobile nature of social media. Your job as a marketer is to stop the scroll by enticing your followers to engage with your content.
Shorter posts on Facebook do just that.