The notion of « client » can be defined as he who obtains good or services provided by an organization or person.
There are two categories of clients :
1) External clients: Clients in the traditional sense of the word, those who pay for what you are providing.
2) Internal clients: Those who work with you, directly or indirectly, in order to provide it
Based on this definition, I realize that my clients are thus all people with whom I exchange. The object of the exchange does not need to be economic and to be limited to goods and services. The exchange often has a psychological and intangible dimension.