Facebook has made numerous changes to their user interface of late, and one of the most reviled changes of them all were changes to the news feed and the introduction of the Ticker.
Now, instead of seeing all of your friends’ posts, you only see a selected few (selected by Facebook of course) showing up in your news feed. Under the new “Edge Rank” system, friends that don’t “Like” and comment on your posts usually stop seeing them altogether before too long.
In order to compensate for not showing your posts in some of your friends’ news feeds, Facebook added the ticker – a box in the right-hand column that lists the activities of your friends as they happen. This is where “Liking” your own posts comes into play.
When you “Like” a post, that action is noted in your friends’ ticker boxes, giving them a chance to at least be made aware that you have posted something even if it doesn’t show up in their news feeds.