If I visit a person's home in Korea what should I do?

First, table manners.
If foreigners visit a home in Korea. When eat food, you should say the food is delicious, even if it is not
because foreigner is little hard-hitting. For example, the spicy food is not delicious for foreigner. So they can say "Oh, it is not delicious." And then mother feels disappointed. Finally, if foreigner feel unaccustomed taste. They should not say "It is not delicious."

Secomd, table manners.
When eat food, you should not before eat than adult. It is traditional table manner in Korea.
For example, never begin eating until everyone is seated and the adults starteating.
And say " I freatefully receive" before meal and " Thank you for the meal" after meal.