To make an article display first in the article feed you can pin the article by following the below steps:
Click the three dots on the article on the article feed or article management page.
Select Pin – the article will now display first in the feed.
Up to three articles can be pinned at any one time.
If you have three pinned articles and you wish to pin another you must unpin one first:
Click the three dots on the article on the article feed or article management page.
Select Unpin – the article will now display in order of when it was published.