im pretty sure that the term is used so that the person ( who said "ff") could also get a notificaTIOnn ^^
When you reply on a comment, you'll be automatically notified when there are new reply to the comment. So, you're following the conversation.
(I hope it makes sense, I'm suck at explaining things T^T)
As the others said, when people type ff or following, it's so that whenever someone else replies, they'll get a notification for it. Say someone asked a question you didn't know the answer to but really wanted to know, too. You could type ff, and when someone else answers, you'll get a notification. Basically, it just makes it easier to get back to the comment and you don't lose it.
Hello. Someone asked me what does 'ff' or following mean. I dont know how to explain. Can someone explain to me so that I could explain to him/her