Whats happen on facebook when .....?

[Abhishek]

Yes ,I think so,I had made pages on FB and the notfication pops up when there is a new liker,I do receive mails from FB about a new liker.
But if they have a huge list of likers,they would not pay attention seeing all their emails of likers.but as you instantly unliked it,they won't get a notification about it.don't worry ,reactivate your account.just in case you want to check this,make a new account on FB ,a new page and like it using another account and instantly unlike,deactivate... and check your page about new notifiactions and sort of that if you are more concerned about the step you made.

hope this helps.