colloquial expression used to agree or show empathy (e.g., 'right?', 'I know, right?'). Common in casual speech.
A: 明日は雨みたいだよ。 B: だよね、傘持っていこう。
A: It looks like it's going to rain tomorrow. B: I know, right — let's take an umbrella.
このケーキ、本当に美味しいね。だよねー！
This cake is really good. I know, right!
忙しくて寝不足だよね、だよね、休まないと。
You're busy and sleep-deprived, right — you need to rest.