What it means
に関わる expresses that something is related to, connected with, or has an important effect on something else. It is especially common when the matter involves serious consequences, responsibility, safety, or a person's future. As a predicate, it follows a noun or noun phrase and means that the subject concerns or affects that matter. It can also appear before a noun, as in a phrase meaning “a problem concerning ...”.
Usage note
に関わる is often more formal and consequential than に関する. に関する generally means simply “about” or “related to,” whereas に関わる often suggests direct involvement or significant impact.
How to use it
Nounに関わります
この決定は会社の将来に関わります。
This decision concerns the company's future.
Nounに関わる
この決定は会社の将来に関わる。
This decision concerns the company's future.