Facebook really, really wants you to try Facebook Home on your Android phones. Home is the new Facebook app that takes over your phone's home screen, functioning as a sort of operating system skin on your phone. In Home, your homesecreen becomes a news feed of all your friends photos.
The problem, of course, is that most Android users have already spent a long time customizing and rigging their home screen the way they want, with desktop backgrounds and most-used apps on the front page.
It will not be easy to persuade them to cover all that with a layer of Facebook.
So Facebook is advertising Home itself, in the news feed, the same way its ad clients do. Here's what the ads look like: