You’ll be able to create important notes on the web, and they’re fully viewable on mobile. To see the notes your friends have written or of your own, visitFacebook.com/notes or search “notes” on mobile.
With this update, you can add a cover photo that represents what your note is all about. You can caption and resize photos, and format your text into headers, quotes or bullets.
More info. http://newsroom.fb.com/news/2015/09/updates-for-facebook-notes/