Zig zag makes a stitch that looks something like this /\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/\/ it zig, zags! A stretch stitch will stretch with your fabric, rather than pop aloose and have your seam come out, great for todays stretchy fabrics.

I agree, Kenmore from Sears are great, I have had many and I just have a plain one, no fancy bells, whistles, or stitches....