By choosing the right post length
A Facebook post is now limited to 63,206 characters ... It is long. Like 20 pages long ... This maybe explains why publications of 80 characters or less usually received an engagement on average 66% higher.
However, a National Public Radio study found that if their short messages (less than 120 characters) had higher click-through rates, longer messages (280 characters or more) received more clicks for "View more".
This being said, do not be afraid to experiment with post length to see what works best according to your goals.
By maintaining your readers engaged
You are unlikely to attract the attention of your audience by introducing your latest article with a long monotonous description. Questions, however, have a more engaging side and are a great way to challenge your readers.
Bullet lists also work well to introduce the context of a publication while retaining some mystery on the content itself.
Another way of introducing an article without saying too much is to use a quotation or a short extract highlighting some interesting facts.
And why not include some emojis too? While this might not be ideal for any audience, a Hubspot study has shown emojis can increase numbers of likes by 57%, comments, and actions by 33%!
In any case, avoid the "Share if you like" ranting messages. Facebook could easily spot them and make them totally invisible.