Personal pronouns are words that replace specific nouns in a sentence, making communication smoother and less repetitive. Common examples include I, you, he, she, it, we, and they. These pronouns help indicate who is speaking, who is being spoken to, and who or what is being discussed. Personal pronouns can be categorized into three main types: first-person (referring to the speaker, like I and we), second-person (referring to the listener, like you), and third-person (referring to others, like he, she, it, and they). Understanding personal pronouns is essential for clear and effective communication.