Facebook is simplifying the left-hand navigation of users home page for easier access to most fundamental parts of Facebook. "News Feed, Messages, Friends, and Events, will comprise the top part of home page navigation. Right below the top line, you'll see your favorite games, Facebook Photos app, or anything else that you use often or have chosen to bookmark. Note Photos app moved into this section.
If you don't use an app for 30 days, it'll move below the "More" link in the Games and Application navigation. You can always edit your games and applications bookmarks by clicking "edit" link at the bottom of your list of bookmarks. If you ever want to move a game or application above "More" link--such as Photos--just click "More" and then "Edit" and drag any of your applications to one of your top six," revealed Facebook.