有用 + 的 + Noun
The adjective 有用 (yǒuyòng) means 'useful' or 'helpful.' It describes something that has practical value or serves a purpose. It can be used as a predicate or as a modifier before a noun.
这本书非常有用,推荐你看看。
Zhè běn shū fēicháng yǒuyòng, tuījiàn nǐ kànkan.
This book is very useful; I recommend you take a look.
学一门外语对找工作很有用。
Xué yī mén wàiyǔ duì zhǎo gōngzuò hěn yǒuyòng.
Learning a foreign language is very useful for finding a job.
他给了我一些有用的建议。
Tā gěi le wǒ yīxiē yǒuyòng de jiànyì.
He gave me some useful advice.