Why do convenience stores that is open 24-hours have lock on their doors?

Convenience stores that are open 24 hours often have locks on their doors for security reasons. These locks allow staff to secure the store during late hours when fewer customers are present, especially during overnight shifts when the risk of theft or vandalism may increase. Additionally, the locks can help manage access during emergencies or when the store is closed for cleaning or restocking. Ultimately, they provide a balance between accessibility and safety.