noun adjective sentence pattern


最近は海外旅行より、国内の温泉旅行やスキー旅行の方が若いカップルに人気です。 why we use 若いカップルに人気です. Noun に
adjective, what does it mean ??  
can anyone explain this sentence pattern ??




This に is an equivalent of the English preposition 'to' used with certain
adjectives, as in:

  * 彼 **に** も難しい問題  
a problem that is difficult also **to** him

  * 私 **に** は健康が重要です。  
**To** me, health is the important thing.

In English, I think people usually say "popular among young couples" rather
than "popular to young couples". But in Japanese, we can safely use に with 人気.
You have to memorize "popular among X" translates to "Xに人気".

