We use personal pronouns (I, me, he, him, etc.) to replace names or nouns when it is clear what they refer to. We use possessives (my, your, her) when it is not necessary to name the person the thing belongs to. We use personal pronouns to avoid repeating nouns.

There are three main types of personal pronouns: subject pronouns, object pronouns, and possessive pronouns. Subject pronouns are used as the subjects of sentences, object pronouns function as the objects of verbs or prepositions, and possessive pronouns indicate ownership or belonging.