The word она is a personal pronoun that declines like this:

The «н» versions of the pronoun occur when the pronoun is the object of a preposition.

Она refers to feminine singular nouns, which can be either people or things, so sometimes it is translated as she/her, and sometimes it is translated as it. In other words, if you are refering to an учительница "school teacher," then the sentence must be translated with she/her, and if you are refering to a машина car, the same sentence must be translated with it:

In casual conversation it's common in America to say things like “Me and Sally went to the store,” especially when we are children. Schoolteachers then try to beat us out of that habit and make us say “She and I went to the store.” Because of that influence, English speakers may be tempted to say things like «Она и я ездили в магазин» in Russian. While theoretically one can say that in Russian, no one ever does. Instead it gets rephrased as “we with her” «мы с ней». Of course, it would be ridiculous to translate that as “we with her” in English; you still want “she and I” or just plain old ‘we.’