Polite, honorific way to address a group. Used in formal speeches, announcements, and customer service. More respectful than 皆さん.
Everyone, thank you for gathering here today.
お客様、皆様にご満足いただけたでしょうか。
Dear customers, we hope you are all satisfied.
We would like to make an important announcement to everyone.
We kindly ask for everyone's cooperation.
Everyone, please wait a moment.
Thanks to everyone, it was completed safely.
皆様 is a very formal, honorific way to address a group, while みんな is the plain, casual equivalent used among friends or family.