What is the meaning internal and external customer ?how to related to hospitality industry

An external customer is someone who uses your company's products or services but is not part of your organization. If you own a retail store, for example, an external customer is an individual who enters your store and buys merchandise. An internal customer is any member of your organization who relies on assistance from another to fulfill her job duties, such as a sales representative who needs assistance from a customer service representative to place an order.

Internal customers are part of the company's(employee) . External customers use a company’s products or services but are not part of the company( Guests) .