Backstitch represents a needlework technique which involves creating small in-out stitches in order to firmly fasten two material pieces together. This approach provides durability and prevents the material from fraying. The backstitch may be used for a selection of stitching projects, such as sewing the hem, stitching appliques, or even creating blankets. It provides a neat and professional look to the final piece.
How to Whipstitch with Pictures wikiHow