Customers can use their own devices, such as computers or smartphones, to place orders directly via an online ordering system for restaurants. This system is typically integrated with the restaurant's website and allows customers to select items from a menu, customize orders if needed, enter payment information securely, and submit their orders. The restaurant receives the order in real-time and can then process it quickly while ensuring the accuracy of customer details and delivery instructions. By automating this process, restaurants can increase efficiency while providing an enhanced customer experience.