Difference between to turn on and to turn off in Korean
틀다·끄다

틀다to turn on
(틀다) means to make something start working, like a TV, radio, music, a heater, or water. Use it when you turn something on or start playing it. It is common in everyday life at home, at school, in stores, and while traveling.

끄다to turn off
끄다 means to turn something off so it stops working, shining, or making sound. You can use it for things like lights, TVs, phones, music, or a car engine. In Korean, the thing you turn off usually comes before the verb, like "불을 끄다" for "turn off the light."
The difference
to turn on (틀다) and to turn off (끄다) are nearby Korean vocabulary items learners often meet together. Use “to turn on” when (틀다) means to make something start working, like a TV, radio, music, a heater, or water. Use it when you turn something on or start playi… Use “to turn off” when 끄다 means to turn something off so it stops working, shining, or making sound. You can use it for things like lights, TVs, phones, music,…