Hello. I think you meant ser and estar.
So you would have to conjucate the tenses into either present, past, subjunctive, conditional, or future tense.
You would use ser when you are describing something that will almost always stay the same (e.g. your name, where you're from, etc.)
You would use estar when you are describing something that might change in any time (e.g. the place you are living in, your emotion at the time, your studying of spanish, etc.)
Examples:
Yo soy Coreano.
Yo estoy muy cansado.
