GroupMe is great for sharing information, but sometimes it gets annoying to get notifications about new messages. There are several ways to turn off the notifications:
(Some personal info has been blurred out for privacy reasons)
Mute a Single Chat
Mute All Chats for a Period of Time
This is a great option at bedtime or work time. NB
From the chat list screen, you need to bring up your settings.
Click the three horizontal bars in the top left corner
Then click “Settings”
Then click “Turn off all notifications”
Then click the appropriate mute time from the list.