A full range of PES 2016 tutorials can be found HERE.
PES Formation Tutorial:
This tutorial is a guide to show you the best formation to use in PES 2016. PESEP discusses, in detail, the benefits and downsides to each individual formation. The best PES formation depends on the type of PES player you are and the players you have at your disposal.
Whilst it is important to try multiple formations, this should be done in an effort to determine the best formation for your PES game. Learning one, or a few, formations inside out will really give you the edge over your opponents.