Mitered corners are a common technique in sewing used to create crisp, professional-looking corners on items like pillows, bags, and garments. The technique involves cutting the fabric at a 45-degree angle and then sewing the two pieces together to form a neat and seamless corner.
Mitering corners is important because it gives a polished and finished look to sewn items. It is also a relatively simple technique to master, making it a valuable skill for any sewist.