noun
Refers to a person who uses a service, facility, or system, such as a library, public transport, or online platform. Often used in business or service contexts.
この図書館の利用客は一日に約五百人です。
This library has about 500 users a day.
駅の利用客が増えている。
The number of station users is increasing.
客 is a broader term for 'customer' or 'guest', not necessarily tied to the use of a service.
Compound of 利用 (use, utilization) and 客 (customer, guest).