Zigzag seams are a type of stitch used in sewing that creates a zigzag pattern. This stitch is commonly used to finish the edges of fabric, preventing fraying and providing a neat appearance. It is versatile and can be adjusted in width and length, making it suitable for various fabrics and projects. In addition to edge finishing, zigzag seams can also be used for stretch fabrics, as they allow the material to move without breaking the thread. Many sewing machines, including those from brands like Brother and Singer, come with built-in zigzag stitch options for convenience.