Self-service refers to a system where customers can perform tasks on their own without needing assistance from staff. This approach is commonly seen in places like grocery stores, where shoppers can scan and pay for their items at self-checkout machines. It allows for quicker transactions and gives customers more control over their shopping experience. In addition to retail, self-service is also prevalent in industries like banking and hospitality. For example, online banking platforms enable users to manage their accounts, transfer money, and pay bills without visiting a bank branch. This convenience enhances efficiency and reduces wait times for customers.