Decorative stitching is often called embroidery.
While "decorative stitching" is a general term, embroidery specifically refers to the art of embellishing fabric or other materials with needle and thread or yarn. Embroidery can incorporate a wide variety of stitches, colors, and materials to create intricate and visually appealing designs.
Therefore, when referring to decorative stitching, particularly when done by hand, embroidery stitches is a more accurate and common term. Machine sewing also offers decorative stitches built into the machine, often referred to as decorative stitches within the context of sewing. However, the overarching term encompassing all forms of decorative stitching remains embroidery.
