You can pin updates you have made as a community admin to the top of the page to make them more visible and stay at the top of a feed.
Pin to top:
Find the update you want to pin to the top
Click the three dots on the top right-hand corner
Click "Pin to top."
Confirm your selection
To remove a pinned post from the top, do the same:
Find the post you want to unpin
Click the three dots at the top right-hand corner
Choose "unpin"
Confirm your selection