According to your role,

We will see

The macro :

-Map awareness

-Decision making

-Mini map tricks

-Timing back

-Objectives

-Push, freeze, rotations

-Some random tips that helps a lot and make a huge diff

then the Micro :

-Counter match up

-Power spikes and knowledge

-Csing,

-All in, greed, cheese

-Items optimization

-and more depending on your champions and your role

And a lot more.