Refers to something produced as a result of effort, thought, or a process. Often used in formal or abstract contexts, such as the outcome of research, labor, or historical forces.
This paper is the fruit of many years of research.
Culture is a product of history.
Compound of 所 (place, that which) and 産 (produce, give birth). The combination conveys the idea of 'that which is produced' or 'result of production'.