Security tags are small devices attached to products in retail stores to prevent theft. They are often made of plastic and contain a locking mechanism that makes it difficult to remove them without special tools. When a customer purchases an item, the cashier uses a tool to deactivate or remove the tag, allowing the customer to take the product home. These tags work in conjunction with security systems at store exits. If someone tries to leave the store with an item still tagged, the system will trigger an alarm. This helps retailers reduce losses from shoplifting and maintain a secure shopping environment.