Vacuum sealing is a method of packaging that removes air from a bag or container before sealing it. This process helps to preserve food by slowing down the growth of bacteria and mold, which thrive in oxygen-rich environments. It is commonly used for storing meats, vegetables, and leftovers, extending their shelf life significantly. The vacuum sealing process typically involves using a vacuum sealer machine, which creates a tight seal around the food. This technique is also useful for protecting non-food items, such as documents or electronics, from moisture and dust. Overall, vacuum sealing is an effective way to keep items fresh and safe.