Expandable compartments are storage areas designed to increase in size or capacity when needed. They are commonly found in bags, luggage, and organizers, allowing users to adjust the space according to their requirements. This feature is particularly useful for accommodating varying amounts of items, making it easier to pack or store belongings efficiently. These compartments often use zippers, snaps, or other mechanisms to expand and contract. For example, a backpack may have an expandable compartment to hold extra clothing or gear during a trip. This versatility helps users stay organized while maximizing the use of available space.