Basting is simply sewing a running stitch....but making them about 3 stitches per inch. you go over the whole quilt to sew the 3 layers together so they don't shift around while quilting. Seriously, if you go to Google and type in BASTING you may even get pictures. Not that we don't want to help --- but there are so many answers on Google that you can get instantly rather than wait for us!!! I've sewn for years and I go to Google and look up stuff....and learn SOOOO much!