Welcome to “Customer Service 101: Defining Your Customers,” a video lesson that explains who qualifies as a customer. This lesson is the first of seven in the “Customer Service 101” video course, which helps you get to know your customers better and serve them more effectively. First, this lesson provides definitions for internal and external customers. Then, it describes when you might become the customer yourself—and how to be a great one. By completing this lesson, you’ll learn why it’s important to think of everyone as a potential customer!