When to use the verb "Ser" and when to use "Estar"!?
As far as I understand, both verbs are (to be)

Question

Answer

SER:
-Description: Ella es alta.
-Origin.: Jon es de Bilbao
-Identity: Ellos son los profesores
-Time:   Son las diez de la mañana.
-Existence: God exists

ESTAR:

-Health: Ella está bien.
-Emotions: Estoy triste
-Location:  María está en Madrid.
-Present Progressive: Estan jugando

Answer

We use the verb " ser" when is a characteristic of person or object. 
And we use " estar" when we refer a state, place, like a present continuous. 
For example: 
She is beautiful-----> Ella es guapa.
She is in Spain----> Ella está en España.