According to practice management expert Duncan MacPherson of Pareto Systems, the three main types of consumers — customers, clients, and advocates — can mean different things for the way you do business, and the way you're perceived by those who do business with you.
MacPherson identifies the three types: "A customer is someone who has some business with you but has business placed with another advisor, too. A client is someone who empowers you fully but who never refers people to you. An advocate is someone who is an absolute joy to work with and who endorses you to anyone who will listen."