VFFS stands for Vertical Form Fill Seal, which is a type of packaging machine used to package various products such as food, pharmaceuticals, and consumer goods. VFFS Packaging machines work by forming a tube out of a roll of flexible packaging material, filling the tube with product, and then sealing the tube to create a package. The process is vertical because the tube is formed vertically and the product is filled from the top. There are several types of VFFS machines available, including intermittent motion machines, which form, fill, and seal packages one at a time, and continuous motion machines, which can form, fill, and seal multiple packages simultaneously.