Many of my students dread conjugating verbs. They dread it even more when the verbs are irregular and have the same meaning!! The verbs ser and estar both mean "to be", so what is the difference between the two?? Ser is used to describe things that are permanent or often unchangeable. For example, Yo soy de Estados Unidos.(I am from the United States). The form of ser used in the sentence is soy. You can not change where you are from. Ser is also used to describe characteristics, professions, religions and nationalities.
Estar is used to describe things that are temporary. For example, Yo estoy en Florida para las vacaciones(I am in Florida for vacation). I am vacationing in Florida, but I am not from there. There is a little rhyme that is printed in the textbook, Realidades, which helps you remember when to use the verb, estar. The rhyme goes, For how you feel or where you are, always use the verb estar. Estar is used to describe emotions and locations.
These are the differences between ser and estar.