。
She's very cute, isn't she?
Literal
She [topic-は] very cute is [right?-ね].
ね at the end softens the assertion into a request for agreement, like English tag questions ('isn't she?'). It invites the listener to share the speaker's view rather than just informing — a tiny piece of conversational maintenance that's everywhere in spoken Japanese. Without ね, the sentence would feel like a flat statement, not an invitation to react.