Most tutorials on this site have been designed to build on top on others.
This makes it easier to follow them in specific sequences.
A series represents this kind of sequence that has been premade with a specific kind of output and topics in mind.
A series is like a playlist.
This video dwells into a few basics about polygons and their normals.
It is one of those fundamentals of polygons that is useful in almost any 3D software package which works with them. We will also look at how to use some basic expressions to orient them the way we want.