The backstitch is a hand-sewing technique used to create strong seams and finish edges. It involves stitching backward to reinforce the seam, making it ideal for sewing fabrics like cotton or denim. This method is often used in embroidery and mending, providing durability and a neat appearance. To perform a backstitch, start by inserting the needle from the back of the fabric to the front. Then, take a small stitch forward and bring the needle back to the previous stitch's end. Repeat this process to create a continuous line of stitches, ensuring a secure and reliable seam.