知っておいた方がいい

should know in advance

→ 知る
phrase Rare #41,404
should know in advance Literally, “it would be better to have learned/known”; suggests that knowing something beforehand would be advisable.
JA: 出発時間は知っておいた方がいい。
EN: You should know the departure time in advance.

私が知っておいた方がいい問題点はありますか?

Are there any issues I should be aware of?

トムについて知っておいた方がいいことって、他に何かある?

Is there anything else I should know about Tom?

事件の真相を知っておいた方がいい。

You'd better know the truth behind the incident.