Let's Learn Korean!---Thank you!

안녕하세요! ^^

Today, we will learn how to say thank you. There are actually several ways to say thank you, depending on the politeness level. The level of respect differs according to relationship. Most of you would have known the first one---

감 사 합 니 다 Gamsahamnida
Gam-sa-ham-ni-da
It's respectful, and is used towards strangers and those who you wish to respect.

고 맙 습 니 다 Gomapseumnida
Go-map-seum-ni-da
It's also respectful but used less frequent. 감 사 합 니 다 is a little bit more respectful than 고 맙 습 니 다.

대 단 히 감 사 합 니 다 Daedanhi gamsahamnida
Dae-dan-hi gam-sa-ham-ni-da
It has the highest level of gratitude. Literally, it means "great thanks".

고 마 워/고 마 워요Gomawo/Gomawoyo
Go-ma-wo/Go-ma-wo-yo
This can only be used with close and intimate friends and family.

Whenever you are in doubt, just use the formal type 감 사 합 니 다 or고 맙 습 니 다.

Summary
1)감 사 합 니 다. Gamsahamnida. Thank you. (The most formal)
2)고 맙 습 니 다. Gomapseumnida. Thank you. (Formal)
3)대 단 히 감 사 합 니 다. Daedanhi gamsahamnida. Thank you. (Great thanks)
4)고 마 워/고 마 워요. Gomawo/Gomawoyo. Thanks. (Informal)

For someone that is older than you, it's essential to use the formal term. Unless it's someone that you know you won't offend him or her, like your best friend, you can use the informal term.

Woah! Is that too much to absorb? Haheho… if cannot just remember gamsahamnida. I shall end here and see you next time!
안녕! (See you!)

Credits to:
http://survivalphrases.com/korean/guest.php