une salutation
A greeting, like Bonjour!
tu
You, used with a friend, a child or a family member.
vous
You, used politely with an adult you don't know well, or with more than one person.
formal
Polite and careful, for adults you don't know well, teachers or strangers.
informal
Relaxed and friendly, for friends and family.
francophone
A person or place where people speak French.