ð both verbs mean to be

ð used in different contexts

ð one of the 4 hardest concepts for English speakers because there is no comparable concept in English

ð it may be possible to use either verb in a sentence, but the meaning will change!

Uses of SER	Uses of ESTAR
nationality	location
Nacho es de Chile.	Gaiser está en Vancouver.
what it's made of
La mesa es de madera.
linking nouns
Nacho es estudiante.
possession
La computadora es de la profesora.
time, date
Son las dos. Es el seis de noviembre.
characteristics (things that don't normally change)	conditions (things that are out of the ordinary)
Nacho es bajo.	Nacho está cansado.