A parcel locker is a secure storage system that allows users to send and receive parcels conveniently and securely. It consists of lockers, typically placed in public or semi-public areas such as shopping centers, airports, and train stations. Carriers can place their parcels inside each locker for safekeeping until the recipient collects them. Parcel locker systems provide a safe and reliable way for online shoppers to receive their packages without worrying about leaving items vulnerable outside or waiting for delivery.