The Smart Bulletin feature of the LG G4 adds an additional homescreen that gives a quick access to the Music app, Calendar, QR remote, LG Health, Smart settings and Smart Tips. But if you don't really use most these apps or simply don't want an additional homescreen, then you might as well turn this feature off.
Here's the step by step procedure:
Tap on Apps > Settings, then go to the Display tab and select Homescreen settings. Toggle the Smart Bulletin switch off and that's it.