New setting for group admins

Today, we're launching a new group setting where only admins are able to send messages to a group. One way people use groups is to receive important announcements and information, including parents and teachers at schools, community centers, and non-profit organizations. We've introduced this new setting so admins can have better tools for these use cases.

https://blog.whatsapp.com/10000644/New-Group-Setting-for-Admins