Posting in your group will broadcast a message to the members in the group. If it is a private group, your post can only be seen by the members and admins in the group. If the group is a domain group, everyone in your domain can see your post.
To post in your group:
① Make sure that you have your group selected under “My Group”
② Compose a message in the Post box
③ Attach a file (optional)
④ Click [Post]