I have had a number of people ask me lately how to pin a post on their Facebook page. Post pinning is a feature of the timeline layout that enables a page admin to designate a post that can remain at the top of their page for up to 7 days.
With Facebook's strict rules against including calls to action in cover images, making sure that a page's most important messaging is as close to "above the fold" as possible is critical for marketers.
Here is a handy video I found by Dorien Morin-van Dam that details how to pin a post to the top of a page. I hope you all find it helpful!