Hello,
I’m french so sorry if my english is bad 
I started learning Unity, and it’s an awesome software !
I’ve a basic question : when you animate a character, do you move it (on Z axis) directly in 3d software, or later in Unity ?
Like in this tutorial :
The character don’t walk/run on site.
Tell me if the question is badly put 
That is entirely up to you. Both ways work.
Okey 
And for you, what’s the best way ?
Thanks
Depends on which system I am using. If it’s Legacy animations, I do it with code. If it’s Mecanim, I do it with root movement.
Sorry, but it’s not clear in my head 
I “know” the animator, with nodes and transitions.
But what’s legacy ?
Thank you to help me
That’s all basic stuff you should learn before you get too far into development. Read here for more information: Unity - Manual: Animation
Thanks. I had already flown the doc but not enough to understand it.
I’ll restart 