にとって重要だ

be important to

→ に
phrase Rare #24,340
be important to にとって means “for” or “from the perspective of,” and 重要だ changes form as needed, such as 重要です, 重要ではない, and 重要な.
JA: 十分な睡眠は健康にとって重要だ。
EN: Getting enough sleep is important for your health.

これらの問題はにとって重要だ

These issues are important to me.

英語を学ぶ事は若者にとって重要だ

Learning English is important for young people.

このデータはその議論にとって重要だ

This data is important to that discussion.

適切なダイエット運動はともに健康にとって重要だ

A proper diet and exercise are both important for your health.