Vacuum sealing is a process that removes air from a container, thereby creating a tight seal that preserves the freshness of the food inside. By extracting the air, vacuum sealing helps prevent the growth of bacteria and mold, which are often accelerated in the presence of oxygen. This method is particularly useful for storing perishable items like fruits, vegetables, meat, and leftovers. With vacuum seal food containers equipped with a pump, the process is simplified and made more efficient.