expression, godan verb (-ru)
serve as a reference; be helpful; be informative
Used when something provides useful information or a helpful example for one's own thinking, decision, or work. Often used with ~が参考になる or ~を参考にする.
この本はとても参考になる。
This book is very informative.
先輩のアドバイスが参考になった。
My senior's advice was helpful.