Here's a breakdown:
* Third person: This refers to the person being spoken about, not the person speaking or the person being spoken to.
* Singular: This means it refers to one person.
* "Tu": This is the pronoun used for the singular "you" in an informal context.
Example:
* Formal: "Vous parlez français." (You speak French.)
* Informal: "Tu parles français." (You speak French.)
Remember that "tu" is used for informal situations, usually with friends, family, and people you know well. "Vous" is used for formal situations, with strangers, people in positions of authority, or when showing respect.