Facebook 'Keep Your Account Safe'?

I got the same message today when I signed into Facebook (sucessfully). But I just exited out of it (The page saying "Keep Your Account Safe) because it looked quite suspiscious and did not want to risk being hacked or anything like that. It talked about using your mobile for something so I just exited out of it and have had no problems using Facebook otherwise. Just X" out of the message and you should be fine. Good Luck!