用处 (yòngchù) is a noun meaning 'use, usefulness' — it answers 'what is something good for?'. It differs from 用途 (yòngtú), which refers to a specific application or purpose (e.g., a tool's intended function), and from 用法 (yòngfǎ), which means 'way/method of using something'. 用处 focuses on practical value or benefit in everyday situations.