I only ever knew about it because, for a time, there was a dedicated tab in the FB app for it. And that tab ALWAYS had a 'new notification' red dot overlaid. Ev

I only ever knew about it because, for a time, there was a dedicated tab in the FB app for it. And that tab ALWAYS had a 'new notification' red dot overlaid. Every single time. So obnoxious. They did the same thing with their 'Marketplace' and it's been the number one thing that has caused me to no longer even pay attention to any notification icons (within the app; notifications outside the app I had turned off long ago) from them.