shopper

noun shopper

• buyer — A buyer is a person who is buying something or who intends to buy it.
• client — A client of a professional person or organization is a person or company that receives a service from them in return for payment.
• consumer — A consumer is a person who buys things or uses services.
• customer — You can use customer in expressions such as a cool customer or a tough customer to indicate what someone's behaviour or character is like.