how important is good greeting in korea?

Hello, Oscar!

Thank you for accomplishing your homework! This kind of activity helps you to stay on track. Make English speaking and/or writing a daily habit of yours. It only seems impossible until it’s done! So have faith you’ll be better. Keep up the good work! I believe in you. See you in class!

~ T. Lexie

I think good greeting is quite important.
>> I think a good greeting is quite important.

Greeting in polite way or rude way affect the first impression of the person who greets.
>> Greeting in a polite way or a rude way affects the first impression of the person who you greet.

and First impression sometimes lasts long.
>> And a first impression lasts long.

Polite and bright greeting also can make the person who receives a greeting happy.
>> Polite and bright greeting can also make the person who receives it happy.