Make sure you’ve read the general notes about all the nodes: Reference - nodes

Paths to curves

This node converts paths to curves.

You can control how sharp or smooth each turn will be in the resulting curves. Higher values of the turn size will give smoother turns. Note however that when a path segment is too short to accomodate for a too large turn size (eg a segment of 6 units long can only have turn values of 3 on both ends), the result curve at that turn will automatically cap the turn value to the maximum allowed by that segment.