Everything one does is to ensure that the viewers' eyes goes to what you think is important.
The viewer tries to assign every element some degree of importance and the viewer gets hints from brightness, focus and placement.
So, in processing, you want to put important stuff in important places, minimize distracting elements and maximixe important ones.
This shot shows you 'see' good things to shoot, which is 90% of the battle.
The technical stuff of exposure, focus, final composition will come with practice.
Lew