Casting off is a technique used in knitting to finish a project by securing the last row of stitches. This process involves removing the stitches from the knitting needle while ensuring that the edge remains neat and prevents unraveling. It is essential for creating a clean finish on items like scarves, sweaters, and blankets. The method typically involves knitting two stitches, then pulling the first stitch over the second and off the needle. This is repeated until all stitches are cast off. Proper casting off is crucial for maintaining the shape and integrity of the finished piece, whether it’s a knitted garment or a decorative item.