I saw this in a Elevator Script, what does it mean?
workspace.Part.Velocity = workspace.Part.CFrame.lookVector * 300
It would make the part fly forward; aka it would fly in the direction it is facing. The way a part is facing is determined by it's front face. lookVector is very useful for gun scripts, as it lets you make the bullet shoot towards the direction it's facing.
Comment if you have more questions.