Correct way to Draw Line (not debug)

Hello,

I would like to ask you if my blueprint script is correct for drawing lines (screenshot below), I would like to use it for production, but it says that Draw Line is Debug, what does it mean? That I shouldn’t use it for production? Because I want only simple line like Draw Debug Line, particle effect would be overkill for me, and I am quite happy with Draw Debug Line.

I just have one more question, why my line is blurry when moving?