To be helpful or to come in handy; to serve as assistance to someone or something.
この参考書は受験勉強の助けになる。
This reference book will be helpful for entrance exam study.
あなたのアドバイスが本当に助けになったよ。ありがとう。
Your advice really helped me. Thank you.
懐中電灯は夜の散歩でとても助けになる道具だ。
A flashlight is a very useful tool for walking at night.
翻訳アプリがあれば旅行先での会話の助けになる。
A translation app can be helpful for conversations while traveling.