Mobile:
Go to Messages
Click on the New Message button at the top right corner
Type or select Users to include in Message
Type Group Message Name and/or add Image
Click Create at the top right corner
Type message in box at bottom of screen
Click Send in bottom right corner
Web:
1. Go to Messages tab
2. Click +New Message in top right corner
3. Type or select Users to include in Message
4. Click Give a name or image to this group in bottom middle of screen
5. Type Group Message Name and/or add Image
6. Click Save
7. Type message in box at bottom of screen
8. Click Send in bottom right corner