Each platform has its’ own rules and ways of sharing content. For example, a Facebook post will keep re-appearing on a user’s timeline as the post gets more likes or interactions, so there is no need to repost the same message, as the chances are users will start to see duplicate posts. On other platforms such as Twitter and Instagram, posts are less likely to re-appear on a user’s timeline, so you can repeat the post at a different time or on a different day to ensure it has been seen by as many people as possible.