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"María" is a proper noun which is often translated as "Mary", and "eres tú" is a phrase which is often translated as "it's you". Learn more about the difference between "María" and "eres tú" below.
eres tú(
eh
-
rehs
too
)A phrase is a group of words commonly used together (e.g., once upon a time).
1. (general)
a. it's you (contraction)
Yo creo que eres tú, no yo, quien debería hablar con él.I think it's you, not me, who should speak to him.
b. it is you
Eres tú. El amor de mi vida siempre has sido tú.It is you. The love of my life has always been you.