"Convert Spline to Poly Line" node. What is it's use and what does it do?

okay, thanks for the reply!
I guess I can ignore that node for now.
I will look into Rama’s plugings, thanks for the tip.

btw, I am not looking for 3D lines, I need 2D lines but I also need them to bend sometimes.
I am currently trying it with splines and splinemeshes, but I get mixed results with that.
(Advice needed about splines/splinemeshcomponent (runtime))
So I was hoping to find a easier way to get lines (or something that looks like a line) following a spline, but I will be testing with this a bit more to hopefully get a better result.