A serger stitch is a type of stitch created by a sewing machine known as a serger or overlock machine. This stitch is designed to finish the edges of fabric, preventing fraying and providing a clean, professional look. It typically uses multiple threads, allowing for stretch and durability, making it ideal for knit fabrics and seams that require flexibility. Serger stitches can vary in style, including 3-thread, 4-thread, and 5-thread options, each offering different levels of strength and finish. The versatility of serger stitches makes them popular in both home sewing and professional garment construction, enhancing the overall quality of the finished product.