Pin Important Posts to the Top of your Page on Your Facebook Page
When you post new content to your Facebook Business Page, older posts drop down your Timeline. However, you may need a particular post to stay at the top of your page for longer — even after you publish new posts. To do this, Facebook offers the option to “pin” a post to the top of your page.
To pin a post, click on the drop-down arrow in the top right corner of a post on your page, and click ‘Pin to Top.’ It will then appear at the top of your page, flagged with a little orange bookmark.