Personal (Nominative) Pronouns

Personal pronouns are pronouns used as substitutes for proper or common nouns.

Personal pronouns
Singular
I	Yo
You	Tu
He	Él
She	Ella
It	Eso
Plural
We	Nosotros
You	Ustedes
They	Ellos

Personal pronouns are useful because you don't have to repeat words.

They can be used to talk about something or someone that you have already talked about.

e.g. Elizabeth put the coat on because Elizabeth was cold.
This would be better written as:
Elizabeth put the coat on because she was cold.

The word she is a personal pronoun and means 'Elizabeth' in this sentence.
This makes the sentence shorter and more interesting, as you don't have to repeat 'Elizabeth'.

NOTA: En el inglés, es muy común utilizar los pronombres personales explícitamente, incluso cuando el contexto ya es comprendido, como mediante la lectura de las palabras que siguen. Además, los pronombres personales deben corresponder al género, número de personas u objetos que se describen de forma correcta.