The Four Commonly Used Korean Speech Levels Nowadays: jondanma | 한국어 공부~ 👇Learn Korean/kpop Q n A International→한국어와 영어로←👇

The Four Commonly Used Korean Speech Levels Nowadays: jondanmal and banmal
In modern-day Korea, only four styles of speech: Hasipsio-che (하십시오체), Haeyo-che (해요체), Haera-che (해라체), Hae-che (해체) are frequently used in everyday life. The first two styles are called polite speech (Jondanmal ) and the last two styles are called casual speech (banmal).

Here is the summary for each speech level with example usage:

Formal and polite/ 합니다/ Hasipsio-che (하십시오체): used by TV broadcasters, to elders
Formal and casual/ 한다/ Haera-che (해라체): used in reported speech and written materials
Informal and polite/ 해요/ Haeyo-che (해요체): used between strangers, colleagues
Informal and casual/ 해/ Hae-che (해체) or banmal (반말): used between close friends and to younger people