When you open your Facebook account, checking messages could be the first work you prefer to do. The popping red button displays the number of messages in your Inbox. You check these messages & get back to some other stuffs on Facebook, as usual.
Have you checked your OTHER folder anytime before?
Actually, maximum people are unaware about this folder. In “other” there may be messages from known & unknowns as well. It’s like a spam folder but many times some important messages get placed into it. If you haven’t checked your OTHER folder, then it might be possible that you have missed some important messages too.
Whenever we see a red message icon, we jump to inbox & the OTHER folder remains unnoticed. It has a light color font & this is the reason our eyes usually can’t notice it. Recently, when I noticed this folder I got to know that it’s not a spam folder though & I found some messages lying there for 4–5 months from my friends.. :p
So, take care of your “other folder” too so that you don’t miss anything important.