Lg g3 open an application?
Smart Tips is part of Smart Bulletin - the permanent screen to the left of the other home screens on the default LG launcher. 

It can be turned on/off in home screen settings, accessed either via the app drawer (three dots at the top right) or the settings app. 


When you turn on Smart Bulletin, Smart Tips is automatically enabled. Occasionally it will notify you of new tips that are available.