When to use to know in Korean
Korean: 알다[ al-da ]

When to use it
알다 (to know) means to have information in your mind or to be familiar with someone, something, or a place. You use it when you know a fact, know a person, or know the answer. It is very common in daily Korean, especially in sentences like "I know" and "Do you know?".
Example sentences
저는 그 사람을 알아요.
I know that person.
민수는 정답을 알아요.
Minsu knows the answer.
이 길 알아요?
Do you know this road?
엄마는 그 가게를 잘 알아요.
Mom knows that store well.
아빠는 쉬운 요리법을 알아요.
Dad knows an easy recipe.
그 호텔 이름 알아요?
Do you know the name of that hotel?