The term 'みんな' is informal and often used in casual conversations. For more formal contexts, '皆さん' (minasan) is preferred. It is commonly used to refer to a group of people collectively.
みんなで映画えいがを見に行こう。
Minna de eiga o mi ni ikou.
Let's all go to see a movie.
みんなが集あつまった。
Minna ga atsumatta.
Everyone gathered.
皆さん (minasan)
everyone
全員 (zen'in)
