How do you use lookVector to move a part?

So if I want a part to move in the direction it is facing how would I do that? I'm not asking for a script but on how to use lookVector.

I don't know if you would actually use lookVector in a situation like this. I only use lookVector for things like putting items in front of the player. To move an object the direction it's facing (if the script is in the object) you would do exactly this:

script.Parent.CFrame = script.Parent.CFrame*CFrame.new(0,0,-1)

and it will move 1 stud in the direction it's facing.