Serpentine Stitch4:44 PM
Serpentine Stitch: a stitch that creates a curved snake-like pattern. Serpentine stitching is used for finishing seam edges, and decorative top stitching.
This picture demonstrates the finishing of a seam with a zig zag stitch. The stitching is right along the edge of the fabric, so the stitching catches the edge and keeps the fabric from fraying.
Note: You will need to change the settings on your machine to a slightly longer stitch length. Practice on a scrap first.