A zigzag stitch comes as a standard stitch on most machines. While quilters rarely use this when piecing, the stitch can add decorative stitching to quilts. If appliquéing by machine, a zig zag can be stitched along the edge to secure the appliqué to the background. Some quilters also like to machine stitch the binding using a zig zag.
The pot holder above was decorated with zig zags along with some straight stitching.