Serging is a sewing technique that uses a specialized machine called a serger or overlock machine. This machine trims the fabric edges while simultaneously stitching them, creating a clean and finished look. Serging is commonly used in garment construction to prevent fraying and to provide stretch, making it ideal for knit fabrics. The serger operates with multiple threads, typically four, which allows for various stitch types and finishes. It is particularly popular in the fashion industry and among home sewers for its efficiency and ability to produce professional-quality seams quickly.