Recently I have started working on SharePoint 2013 but sadly I find it very confusing specially App part and web part.
In app part gallery also we have doc library,lists and in web part gallery also, which to use.
As a developer seeing future job perspective I should choose which option developing app part or developing web part.
I basically work with On-premise version no option of cloud. Can i create app for my On-premise version and how any link.