A cashier is a customer service representative who works at a retail store or establishment and is responsible for processing customer purchases and payments. The primary duties of a cashier typically include:

1. Greeting customers as they enter the store or establishment.
2. Scanning or manually entering the prices of items being purchased by the customer.
3. Collecting payment from the customer, either in the form of cash, credit or debit card, or other payment methods.
4. Providing change or receipts to the customer, as needed.
5. Balancing the cash register at the end of each shift.
6. Assisting with inventory management, such as stocking shelves, pricing items, and counting inventory.
7. Resolving customer complaints and answering customer inquiries in a professional and courteous manner.
8. Maintaining a clean and organized work area, including the cash register, counter, and surrounding areas.

In addition to these primary duties, a cashier may also be responsible for performing additional tasks such as handling returns, exchanges, or refunds, processing coupons or discounts, and assisting with sales promotions. Effective communication skills, attention to detail, and basic math skills are essential for success in this role.